--- a/browser/components/about/AboutRedirector.h
+++ b/browser/components/about/AboutRedirector.h
@@ -13,20 +13,20 @@ namespace browser {
 
 class AboutRedirector : public nsIAboutModule
 {
 public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIABOUTMODULE
  
   AboutRedirector() {}
-  virtual ~AboutRedirector() {}
 
   static nsresult
     Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);
 
 protected:
+  virtual ~AboutRedirector() {}
 };
 
 } // namespace browser
 } // namespace mozilla
 
 #endif // AboutRedirector_h__

--- a/browser/components/dirprovider/DirectoryProvider.h
+++ b/browser/components/dirprovider/DirectoryProvider.h
@@ -20,26 +20,30 @@ namespace browser {
 class DirectoryProvider MOZ_FINAL : public nsIDirectoryServiceProvider2
 {
 public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIDIRECTORYSERVICEPROVIDER
   NS_DECL_NSIDIRECTORYSERVICEPROVIDER2
 
 private:
+  ~DirectoryProvider() {}
+
   class AppendingEnumerator MOZ_FINAL : public nsISimpleEnumerator
   {
   public:
     NS_DECL_ISUPPORTS
     NS_DECL_NSISIMPLEENUMERATOR
 
     AppendingEnumerator(nsISimpleEnumerator* aBase,
                         char const *const *aAppendList);
 
   private:
+    ~AppendingEnumerator() {}
+
     nsCOMPtr<nsISimpleEnumerator> mBase;
     char const *const *const      mAppendList;
     nsCOMPtr<nsIFile>             mNext;
   };
 };
 
 } // namespace browser
 } // namespace mozilla

--- a/browser/components/feeds/src/nsFeedSniffer.h
+++ b/browser/components/feeds/src/nsFeedSniffer.h
@@ -21,15 +21,17 @@ public:
   static NS_METHOD AppendSegmentToString(nsIInputStream* inputStream,
                                          void* closure,
                                          const char* rawSegment,
                                          uint32_t toOffset,
                                          uint32_t count,
                                          uint32_t* writeCount);
 
 protected:
+  ~nsFeedSniffer() {}
+
   nsresult ConvertEncodedData(nsIRequest* request, const uint8_t* data,
                               uint32_t length);
 
 private:
   nsCString mDecodedData;
 };
 

--- a/caps/include/DomainPolicy.h
+++ b/caps/include/DomainPolicy.h
@@ -14,33 +14,34 @@
 namespace mozilla {
 
 class DomainPolicy : public nsIDomainPolicy
 {
 public:
     NS_DECL_ISUPPORTS
     NS_DECL_NSIDOMAINPOLICY
     DomainPolicy();
+
+private:
     virtual ~DomainPolicy();
 
-private:
     nsCOMPtr<nsIDomainSet> mBlacklist;
     nsCOMPtr<nsIDomainSet> mSuperBlacklist;
     nsCOMPtr<nsIDomainSet> mWhitelist;
     nsCOMPtr<nsIDomainSet> mSuperWhitelist;
 };
 
 class DomainSet : public nsIDomainSet
 {
 public:
     NS_DECL_ISUPPORTS
     NS_DECL_NSIDOMAINSET
 
     DomainSet() {}
-    virtual ~DomainSet() {}
 
 protected:
+    virtual ~DomainSet() {}
     nsTHashtable<nsURIHashKey> mHashTable;
 };
 
 } /* namespace mozilla */
 
 #endif /* DomainPolicy_h__ */

--- a/caps/src/nsNullPrincipalURI.h
+++ b/caps/src/nsNullPrincipalURI.h
@@ -32,13 +32,15 @@ public:
 
   // nsISizeOf
   virtual size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
   virtual size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
 
   nsNullPrincipalURI(const nsCString &aSpec);
 
 private:
+  ~nsNullPrincipalURI() {}
+
   nsCString mScheme;
   nsCString mPath;
 };
 
 #endif // __nsNullPrincipalURI_h__

--- a/chrome/src/nsChromeProtocolHandler.h
+++ b/chrome/src/nsChromeProtocolHandler.h
@@ -24,12 +24,14 @@ class nsChromeProtocolHandler MOZ_FINAL 
 public:
     NS_DECL_THREADSAFE_ISUPPORTS
 
     // nsIProtocolHandler methods:
     NS_DECL_NSIPROTOCOLHANDLER
 
     // nsChromeProtocolHandler methods:
     nsChromeProtocolHandler() {}
+
+private:
     ~nsChromeProtocolHandler() {}
 };
 
 #endif /* nsChromeProtocolHandler_h___ */

--- a/chrome/src/nsChromeRegistry.h
+++ b/chrome/src/nsChromeRegistry.h
@@ -55,27 +55,28 @@ public:
                                   bool* _retval);
 
   // nsIChromeRegistry methods:
   NS_IMETHOD_(bool) WrappersEnabled(nsIURI *aURI);
   NS_IMETHOD ConvertChromeURL(nsIURI* aChromeURI, nsIURI* *aResult);
 
   // nsChromeRegistry methods:
   nsChromeRegistry() : mInitialized(false) { }
-  virtual ~nsChromeRegistry();
 
   virtual nsresult Init();
 
   static already_AddRefed<nsIChromeRegistry> GetService();
 
   static nsChromeRegistry* gChromeRegistry;
 
   static nsresult Canonify(nsIURL* aChromeURL);
 
 protected:
+  virtual ~nsChromeRegistry();
+
   void FlushSkinCaches();
   void FlushAllCaches();
 
   // Update the selected locale used by the chrome registry, and fire a
   // notification about this change
   virtual nsresult UpdateSelectedLocale() = 0;
 
   static void LogMessage(const char* aMsg, ...);

--- a/hal/HalWakeLock.cpp
+++ b/hal/HalWakeLock.cpp
@@ -92,16 +92,17 @@ RemoveChildFromList(const nsAString& aKe
       NotifyWakeLockChange(WakeLockInfoFromLockCount(aKey, totalCount));
     }
   }
 
   return op;
 }
 
 class ClearHashtableOnShutdown MOZ_FINAL : public nsIObserver {
+  ~ClearHashtableOnShutdown() {}
 public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIOBSERVER
 };
 
 NS_IMPL_ISUPPORTS(ClearHashtableOnShutdown, nsIObserver)
 
 NS_IMETHODIMP
@@ -111,16 +112,17 @@ ClearHashtableOnShutdown::Observe(nsISup
 
   sIsShuttingDown = true;
   sLockTable = nullptr;
 
   return NS_OK;
 }
 
 class CleanupOnContentShutdown MOZ_FINAL : public nsIObserver {
+  ~CleanupOnContentShutdown() {}
 public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSIOBSERVER
 };
 
 NS_IMPL_ISUPPORTS(CleanupOnContentShutdown, nsIObserver)
 
 NS_IMETHODIMP

--- a/services/crypto/component/nsSyncJPAKE.h
+++ b/services/crypto/component/nsSyncJPAKE.h
@@ -15,16 +15,17 @@
 typedef struct PK11SymKeyStr PK11SymKey;
 
 class nsSyncJPAKE : public nsISyncJPAKE
 {
 public:
   NS_DECL_ISUPPORTS
   NS_DECL_NSISYNCJPAKE
   nsSyncJPAKE();
+protected:
   virtual ~nsSyncJPAKE();
 private:
   enum { JPAKENotStarted, JPAKEBeforeRound2, JPAKEAfterRound2 } round;
   PK11SymKey * key;
 };
 
 NS_IMPL_ISUPPORTS(nsSyncJPAKE, nsISyncJPAKE)
 

--- a/startupcache/StartupCache.h
+++ b/startupcache/StartupCache.h
@@ -88,16 +88,17 @@ struct CacheEntry
     return mallocSizeOf(data);
   }
 };
 
 // We don't want to refcount StartupCache, and ObserverService wants to
 // refcount its listeners, so we'll let it refcount this instead.
 class StartupCacheListener MOZ_FINAL : public nsIObserver
 {
+  ~StartupCacheListener() {}
   NS_DECL_THREADSAFE_ISUPPORTS
   NS_DECL_NSIOBSERVER
 };
 
 class StartupCache : public nsIMemoryReporter
 {
 
 friend class StartupCacheListener;
@@ -182,17 +183,19 @@ private:
 };
 
 // This debug outputstream attempts to detect if clients are writing multiple
 // references to the same object. We only support that if that object
 // is a singleton.
 #ifdef DEBUG
 class StartupCacheDebugOutputStream MOZ_FINAL
   : public nsIObjectOutputStream
-{  
+{
+  ~StartupCacheDebugOutputStream() {}
+
   NS_DECL_ISUPPORTS
   NS_DECL_NSIOBJECTOUTPUTSTREAM
 
   StartupCacheDebugOutputStream (nsIObjectOutputStream* binaryStream,
                                    nsTHashtable<nsISupportsHashKey>* objectMap)
   : mBinaryStream(binaryStream), mObjectMap(objectMap) { }
   
   NS_FORWARD_SAFE_NSIBINARYOUTPUTSTREAM(mBinaryStream)
@@ -209,16 +212,18 @@ class StartupCacheDebugOutputStream MOZ_
 #define NS_STARTUPCACHE_CID \
       {0xae4505a9, 0x87ab, 0x477c, \
       {0xb5, 0x77, 0xf9, 0x23, 0x57, 0xed, 0xa8, 0x84}}
 // contract id: "@mozilla.org/startupcache/cache;1"
 
 class StartupCacheWrapper MOZ_FINAL
   : public nsIStartupCache
 {
+  ~StartupCacheWrapper() {}
+
   NS_DECL_THREADSAFE_ISUPPORTS
   NS_DECL_NSISTARTUPCACHE
 
   static StartupCacheWrapper* GetSingleton();
   static StartupCacheWrapper *gStartupCacheWrapper;
 };
 
 } // namespace scache

--- a/tools/profiler/SaveProfileTask.h
+++ b/tools/profiler/SaveProfileTask.h
@@ -38,18 +38,18 @@ public:
   typedef void (*AddSubProfileFunc)(const char* aProfile, void* aClosure);
   NS_DECL_ISUPPORTS
 
   ProfileSaveEvent(AddSubProfileFunc aFunc, void* aClosure)
     : mFunc(aFunc)
     , mClosure(aClosure)
   {}
 
+  NS_IMETHOD AddSubProfile(const char* aProfile);
+private:
   ~ProfileSaveEvent() {}
 
-  NS_IMETHOD AddSubProfile(const char* aProfile);
-private:
   AddSubProfileFunc mFunc;
   void* mClosure;
 };
 
 #endif
 

--- a/tools/profiler/nsProfiler.h
+++ b/tools/profiler/nsProfiler.h
@@ -9,21 +9,21 @@
 #include "nsIProfiler.h"
 #include "nsIObserver.h"
 #include "mozilla/Attributes.h"
 
 class nsProfiler MOZ_FINAL : public nsIProfiler, public nsIObserver
 {
 public:
     nsProfiler();
-    ~nsProfiler();
 
     NS_DECL_ISUPPORTS
     NS_DECL_NSIOBSERVER
     NS_DECL_NSIPROFILER
 
     nsresult Init();
 private:
+    ~nsProfiler();
     bool mLockedForPrivateBrowsing;
 };
 
 #endif /* _NSPROFILER_H_ */