--- a/content/base/src/DirectionalityUtils.cpp
+++ b/content/base/src/DirectionalityUtils.cpp
@@ -215,17 +215,17 @@
 #include "nsUnicodeProperties.h"
 #include "nsTextFragment.h"
 #include "nsAttrValue.h"
 #include "nsTextNode.h"
 #include "nsCheapSets.h"
 
 namespace mozilla {
 
-typedef mozilla::dom::Element Element;
+using mozilla::dom::Element;
 
 /**
  * Returns true if aElement is one of the elements whose text content should not
  * affect its own direction, nor the direction of ancestors with dir=auto.
  *
  * Note that this does not include <bdi>, whose content does affect its own
  * direction when it has dir=auto (which it has by default), so one needs to
  * test for it separately, e.g. with DoesNotAffectDirectionOfAncestors.

--- a/content/base/src/moz.build
+++ b/content/base/src/moz.build
@@ -62,17 +62,17 @@ EXPORTS.mozilla.dom += [
     'DOMRect.h',
     'EventSource.h',
     'Link.h',
     'NodeIterator.h',
     'Text.h',
     'TreeWalker.h',
 ]
 
-SOURCES += [
+UNIFIED_SOURCES += [
     'Attr.cpp',
     'ChildIterator.cpp',
     'Comment.cpp',
     'DirectionalityUtils.cpp',
     'DocumentFragment.cpp',
     'DocumentType.cpp',
     'DOMImplementation.cpp',
     'DOMParser.cpp',
@@ -89,22 +89,20 @@ SOURCES += [
     'nsAttrValueOrString.cpp',
     'nsCCUncollectableMarker.cpp',
     'nsChannelPolicy.cpp',
     'nsContentAreaDragDrop.cpp',
     'nsContentIterator.cpp',
     'nsContentList.cpp',
     'nsContentPolicy.cpp',
     'nsContentSink.cpp',
-    'nsContentUtils.cpp',
     'nsCopySupport.cpp',
     'nsCrossSiteListenerProxy.cpp',
     'nsCSPService.cpp',
     'nsDataDocumentContentPolicy.cpp',
-    'nsDocument.cpp',
     'nsDocumentEncoder.cpp',
     'nsDOMAttributeMap.cpp',
     'nsDOMBlobBuilder.cpp',
     'nsDOMCaretPosition.cpp',
     'nsDOMFile.cpp',
     'nsDOMFileReader.cpp',
     'nsDOMLists.cpp',
     'nsDOMMutationObserver.cpp',
@@ -125,19 +123,17 @@ SOURCES += [
     'nsInProcessTabChildGlobal.cpp',
     'nsLineBreaker.cpp',
     'nsMappedAttributeElement.cpp',
     'nsMappedAttributes.cpp',
     'nsMixedContentBlocker.cpp',
     'nsNameSpaceManager.cpp',
     'nsNoDataProtocolContentPolicy.cpp',
     'nsNodeInfo.cpp',
-    'nsNodeInfoManager.cpp',
     'nsNodeUtils.cpp',
-    'nsObjectLoadingContent.cpp',
     'nsPlainTextSerializer.cpp',
     'nsPropertyTable.cpp',
     'nsRange.cpp',
     'nsReferencedElement.cpp',
     'nsScriptElement.cpp',
     'nsScriptLoader.cpp',
     'nsStubDocumentObserver.cpp',
     'nsStubMutationObserver.cpp',
@@ -154,16 +150,28 @@ SOURCES += [
     'nsXMLHttpRequest.cpp',
     'nsXMLNameSpaceMap.cpp',
     'Text.cpp',
     'ThirdPartyUtil.cpp',
     'TreeWalker.cpp',
     'WebSocket.cpp',
 ]
 
+# These files cannot be built in unified mode because they use FORCE_PR_LOG
+SOURCES += [
+    'nsDocument.cpp',
+    'nsNodeInfoManager.cpp',
+]
+
+# These files cannot be built in unified mode because of OS X headers.
+SOURCES += [
+    'nsContentUtils.cpp',
+    'nsObjectLoadingContent.cpp',
+]
+
 EXTRA_COMPONENTS += [
     'contentAreaDropListener.js',
     'contentAreaDropListener.manifest',
     'contentSecurityPolicy.manifest',
     'messageWakeupService.js',
     'messageWakeupService.manifest',
 ]
 

--- a/content/base/src/nsStyledElement.cpp
+++ b/content/base/src/nsStyledElement.cpp
@@ -17,17 +17,17 @@
 #include "mozilla/css/StyleRule.h"
 #include "nsCSSParser.h"
 #include "mozilla/css/Loader.h"
 #include "nsIDOMMutationEvent.h"
 #include "nsXULElement.h"
 #include "nsContentUtils.h"
 #include "nsStyleUtil.h"
 
-namespace css = mozilla::css;
+using namespace mozilla;
 using namespace mozilla::dom;
 
 //----------------------------------------------------------------------
 // nsIContent methods
 
 nsIAtom*
 nsStyledElementNotElementCSSInlineStyle::GetClassAttributeName() const
 {