--- a/content/events/src/nsEventStateManager.cpp
+++ b/content/events/src/nsEventStateManager.cpp
@@ -136,20 +136,16 @@
 #include "mozilla/Services.h"
 #include "mozAutoDocUpdate.h"
 #include "nsHTMLLabelElement.h"
 
 #include "mozilla/Preferences.h"
 
 #ifdef XP_MACOSX
 #import <ApplicationServices/ApplicationServices.h>
-
-#ifdef MOZ_WIDGET_COCOA
-#include "nsCocoaFeatures.h"
-#endif 
 #endif
 
 using namespace mozilla;
 using namespace mozilla::dom;
 
 //#define DEBUG_DOCSHELL_FOCUS
 
 #define NS_USER_INTERACTION_INTERVAL 5000 // ms
@@ -372,30 +368,25 @@ public:
   // Be careful, UpdateTransaction may fire a DOM event, therefore, the target
   // frame might be destroyed in the event handler.
   static PRBool UpdateTransaction(PRInt32 aNumLines,
                                   PRBool aScrollHorizontal);
   static void EndTransaction();
   static void OnEvent(nsEvent* aEvent);
   static void Shutdown();
   static PRUint32 GetTimeoutTime();
-  static PRUint32 GetGestureTimeoutTime();
   static PRInt32 AccelerateWheelDelta(PRInt32 aScrollLines,
                    PRBool aIsHorizontal, PRBool aAllowScrollSpeedOverride,
                    nsIScrollableFrame::ScrollUnit *aScrollQuantity,
                    PRBool aLimitToMaxOnePageScroll = PR_TRUE);
   static PRBool IsAccelerationEnabled();
 
   enum {
     kScrollSeriesTimeout = 80
   };
-#ifdef MOZ_WIDGET_COCOA
-  static PRBool GetGestureTriggered();
-  static void SetGestureTriggered();
-#endif
 protected:
   static nsIntPoint GetScreenPoint(nsGUIEvent* aEvent);
   static void OnFailToScrollTarget();
   static void OnTimeout(nsITimer *aTimer, void *aClosure);
   static void SetTimeout();
   static PRUint32 GetIgnoreMoveDelayTime();
   static PRInt32 GetAccelerationStart();
   static PRInt32 GetAccelerationFactor();
@@ -406,29 +397,23 @@ protected:
                    PRBool aIsHorizontal,
                    nsIScrollableFrame::ScrollUnit *aScrollQuantity);
 
   static nsWeakFrame sTargetFrame;
   static PRUint32    sTime;        // in milliseconds
   static PRUint32    sMouseMoved;  // in milliseconds
   static nsITimer*   sTimer;
   static PRInt32     sScrollSeriesCounter;
-#ifdef MOZ_WIDGET_COCOA
-  static PRUint32    sGestureTriggered; // in milliseconds
-#endif
 };
 
 nsWeakFrame nsMouseWheelTransaction::sTargetFrame(nsnull);
 PRUint32    nsMouseWheelTransaction::sTime        = 0;
 PRUint32    nsMouseWheelTransaction::sMouseMoved  = 0;
 nsITimer*   nsMouseWheelTransaction::sTimer       = nsnull;
 PRInt32     nsMouseWheelTransaction::sScrollSeriesCounter = 0;
-#ifdef MOZ_WIDGET_COCOA
-PRUint32      nsMouseWheelTransaction::sGestureTriggered = 0;
-#endif
 
 static PRBool
 OutOfTime(PRUint32 aBaseTime, PRUint32 aThreshold)
 {
   PRUint32 now = PR_IntervalToMilliseconds(PR_IntervalNow());
   return (now - aBaseTime > aThreshold);
 }
 
@@ -497,39 +482,18 @@ nsMouseWheelTransaction::UpdateTransacti
 
 void
 nsMouseWheelTransaction::EndTransaction()
 {
   if (sTimer)
     sTimer->Cancel();
   sTargetFrame = nsnull;
   sScrollSeriesCounter = 0;
-#ifdef MOZ_WIDGET_COCOA
-  sGestureTriggered = 0;
-#endif
 }
 
-#ifdef MOZ_WIDGET_COCOA
-void
-nsMouseWheelTransaction::SetGestureTriggered() {
-  sGestureTriggered = PR_IntervalToMilliseconds(PR_IntervalNow());
-}
-
-PRBool
-nsMouseWheelTransaction::GetGestureTriggered() {
-  if (sGestureTriggered != 0 &&
-      OutOfTime(sGestureTriggered, GetGestureTimeoutTime())) {
-    // Start accepting new gestures
-    sGestureTriggered = 0;
-  }
-
-  return sGestureTriggered != 0;
-}
-#endif
-
 void
 nsMouseWheelTransaction::OnEvent(nsEvent* aEvent)
 {
   if (!sTargetFrame)
     return;
 
   if (OutOfTime(sTime, GetTimeoutTime())) {
     // Even if the scroll event which is handled after timeout, but onTimeout
@@ -666,22 +630,16 @@ nsIntPoint
 nsMouseWheelTransaction::GetScreenPoint(nsGUIEvent* aEvent)
 {
   NS_ASSERTION(aEvent, "aEvent is null");
   NS_ASSERTION(aEvent->widget, "aEvent-widget is null");
   return aEvent->refPoint + aEvent->widget->WidgetToScreenOffset();
 }
 
 PRUint32
-nsMouseWheelTransaction::GetGestureTimeoutTime()
-{
-  return Preferences::GetUint("mousewheel.transaction.gesturetimeout", 300);
-}
-
-PRUint32
 nsMouseWheelTransaction::GetTimeoutTime()
 {
   return Preferences::GetUint("mousewheel.transaction.timeout", 1500);
 }
 
 PRUint32
 nsMouseWheelTransaction::GetIgnoreMoveDelayTime()
 {
@@ -1552,18 +1510,18 @@ nsEventStateManager::ExecuteAccessKey(ns
 
 PRBool
 nsEventStateManager::GetAccessKeyLabelPrefix(nsAString& aPrefix)
 {
   aPrefix.Truncate();
   nsAutoString separator, modifierText;
   nsContentUtils::GetModifierSeparatorText(separator);
 
-  nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
-  PRInt32 modifier = GetAccessModifierMask(container);
+  nsCOMPtr<nsISupports> container = mPresContext->GetContainer();
+  PRInt32 modifier = GetAccessModifierMask(container);
 
   if (modifier & NS_MODIFIER_CONTROL) {
     nsContentUtils::GetControlText(modifierText);
     aPrefix.Append(modifierText + separator);
   }
   if (modifier & NS_MODIFIER_META) {
     nsContentUtils::GetMetaText(modifierText);
     aPrefix.Append(modifierText + separator);
@@ -2834,32 +2792,16 @@ nsEventStateManager::DoScrollText(nsIFra
             passToParent = PR_TRUE;
             nsMouseWheelTransaction::EndTransaction();
           }
         }
       }
     }
   }
 
-#ifdef MOZ_WIDGET_COCOA
-  // On lion scroll will trigger back/forward at the edge of the page
-  if (isHorizontal && passToParent && nsCocoaFeatures::OnLionOrLater()) {
-    if (!nsMouseWheelTransaction::GetGestureTriggered()) {
-      if (numLines > 4 || numLines < -4) {
-        DoScrollHistory(-numLines);
-        nsMouseWheelTransaction::SetGestureTriggered();
-        return NS_OK;
-      }
-    } else {
-      // Extend the gesture in progress
-      nsMouseWheelTransaction::SetGestureTriggered();
-    }
-  }
-#endif
-
   if (!passToParent && frameToScroll) {
     if (aScrollQuantity == nsIScrollableFrame::LINES) {
       // When this is called for querying the scroll target information,
       // we shouldn't limit the scrolling amount to less one page.
       // Otherwise, we shouldn't scroll more one page at once.
       numLines =
         nsMouseWheelTransaction::AccelerateWheelDelta(numLines, isHorizontal,
                                                       aAllowScrollSpeedOverride,

--- a/dom/plugins/base/nsNPAPIPlugin.cpp
+++ b/dom/plugins/base/nsNPAPIPlugin.cpp
@@ -2184,33 +2184,28 @@ NPError NP_CALLBACK
 #endif
 
   case NPNVsupportsCoreGraphicsBool: {
     *(NPBool*)result = PR_TRUE;
     
     return NPERR_NO_ERROR;
   }
 
-  case NPNVsupportsCoreAnimationBool: {
-    *(NPBool*)result = PR_TRUE;
-
-    return NPERR_NO_ERROR;
-  }
-
-  case NPNVsupportsInvalidatingCoreAnimationBool: {
-    *(NPBool*)result = PR_TRUE;
-
-    return NPERR_NO_ERROR;
-  }
-
-  case NPNVsupportsCompositingCoreAnimationPluginsBool: {
-    *(NPBool*)result = PR_TRUE;
-
-    return NPERR_NO_ERROR;
-  }
+   case NPNVsupportsCoreAnimationBool: {
+     *(NPBool*)result = PR_TRUE;
+
+     return NPERR_NO_ERROR;
+   }
+
+   case NPNVsupportsInvalidatingCoreAnimationBool: {
+     *(NPBool*)result = PR_TRUE;
+
+     return NPERR_NO_ERROR;
+   }
+
 
 #ifndef NP_NO_CARBON
   case NPNVsupportsCarbonBool: {
     *(NPBool*)result = PR_TRUE;
 
     return NPERR_NO_ERROR;
   }
 #endif

--- a/dom/plugins/ipc/PluginInstanceChild.cpp
+++ b/dom/plugins/ipc/PluginInstanceChild.cpp
@@ -397,21 +397,16 @@ PluginInstanceChild::NPN_GetValue(NPNVar
         return NPERR_NO_ERROR;
     }
 
     case NPNVsupportsInvalidatingCoreAnimationBool: {
         *((NPBool*)aValue) = true;
         return NPERR_NO_ERROR;
     }
 
-    case NPNVsupportsCompositingCoreAnimationPluginsBool: {
-        *((NPBool*)aValue) = true;
-        return NPERR_NO_ERROR;
-    }
-
     case NPNVsupportsCocoaBool: {
         *((NPBool*)aValue) = true;
         return NPERR_NO_ERROR;
     }
 
 #ifndef NP_NO_CARBON
     case NPNVsupportsCarbonBool: {
       *((NPBool*)aValue) = false;

--- a/widget/src/cocoa/Makefile.in
+++ b/widget/src/cocoa/Makefile.in
@@ -52,33 +52,31 @@ GRE_MODULE	= 1
 LIBXUL_LIBRARY = 1
 
 
 
 EXPORTS = \
 		mozView.h \
 		nsChangeObserver.h \
 		nsCocoaUtils.h \
-		nsCocoaFeatures.h \
 		$(NULL)
 
 CMMSRCS = \
   nsBidiKeyboard.mm \
   nsClipboard.mm \
   nsMenuX.mm \
   nsMenuBarX.mm \
   nsMenuItemX.mm \
   nsMenuItemIconX.mm \
   nsMenuUtilsX.mm \
   nsMenuGroupOwnerX.mm \
   nsFilePicker.mm \
   nsDragService.mm \
   nsToolkit.mm \
   nsAppShell.mm \
-  nsCocoaFeatures.mm \
   nsCocoaUtils.mm \
   nsCocoaWindow.mm \
   nsChildView.mm \
   nsWindowMap.mm \
   nsWidgetFactory.mm \
   nsCursorManager.mm \
   nsMacCursor.mm \
   nsScreenCocoa.mm \

deleted file mode 100644
--- a/widget/src/cocoa/nsCocoaFeatures.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is mozilla.org code.
- *
- * The Initial Developer of the Original Code is 
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *   Benoit Girard <bgirard@mozilla.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
-#ifndef nsCocoaFeatures_h_
-#define nsCocoaFeatures_h_
-
-#include "prtypes.h"
-
-class nsCocoaFeatures {
-public:
-  static PRInt32 OSXVersion();
-
-  static PRBool OnSnowLeopardOrLater();  
-  static PRBool OnLionOrLater();  
-private:
-  static PRInt32 mOSXVersion;
-};
-#endif // nsCocoaFeatures_h_

deleted file mode 100644
--- a/widget/src/cocoa/nsCocoaFeatures.mm
+++ /dev/null
@@ -1,81 +0,0 @@
-/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
- * ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is thebes gfx code.
- *
- * The Initial Developer of the Original Code is Mozilla Foundation.
- * Portions created by the Initial Developer are Copyright (C) 2011
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *   Benoit Girard <bgirard@mozilla.com>
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
-#define MAC_OS_X_VERSION_MASK     0x0000FFFF // Not supported
-#define MAC_OS_X_VERSION_10_4_HEX 0x00001040 // Not supported
-#define MAC_OS_X_VERSION_10_5_HEX 0x00001050
-#define MAC_OS_X_VERSION_10_6_HEX 0x00001060
-#define MAC_OS_X_VERSION_10_7_HEX 0x00001070
-
-// This API will not work for OS X 10.10, see Gestalt.h.
-
-#include "nsCocoaFeatures.h"
-#include "nsDebug.h"
-
-#import <Cocoa/Cocoa.h>
-
-PRInt32 nsCocoaFeatures::mOSXVersion = 0;
-
-/* static */ PRInt32
-nsCocoaFeatures::OSXVersion()
-{
-    if (!mOSXVersion) {
-        // minor version is not accurate, use gestaltSystemVersionMajor, 
-        // gestaltSystemVersionMinor, gestaltSystemVersionBugFix for these
-        OSErr err = ::Gestalt(gestaltSystemVersion, reinterpret_cast<SInt32*>(&mOSXVersion));
-        if (err != noErr) {
-            // This should probably be changed when our minimum version changes
-            NS_ERROR("Couldn't determine OS X version, assuming 10.5");
-            mOSXVersion = MAC_OS_X_VERSION_10_5_HEX;
-        }
-        mOSXVersion &= MAC_OS_X_VERSION_MASK;
-    }
-    return mOSXVersion;
-}
-
-/* static */ PRBool
-nsCocoaFeatures::OnSnowLeopardOrLater()
-{
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_6_HEX);
-}
-
-/* static */ PRBool
-nsCocoaFeatures::OnLionOrLater()
-{
-    return (OSXVersion() >= MAC_OS_X_VERSION_10_7_HEX);
-}
-