See the following bug reports;

https://bugzilla.mozilla.org/show_bug.cgi?id=623116

https://bugzilla.mozilla.org/show_bug.cgi?id=623123

https://bugzilla.mozilla.org/show_bug.cgi?id=623126

https://bugzilla.mozilla.org/show_bug.cgi?id=628371

diff --git a/xpcom/base/nsDebugImpl.h b/xpcom/base/nsDebugImpl.h

--- a/xpcom/base/nsDebugImpl.h

+++ b/xpcom/base/nsDebugImpl.h

@@ -40,6 +40,7 @@

 class nsDebugImpl : public nsIDebug2

 {

 public:

+    nsDebugImpl() {}

     NS_DECL_ISUPPORTS

     NS_DECL_NSIDEBUG

     NS_DECL_NSIDEBUG2

diff --git a/xpcom/base/nsTraceRefcntImpl.h b/xpcom/base/nsTraceRefcntImpl.h

--- a/xpcom/base/nsTraceRefcntImpl.h

+++ b/xpcom/base/nsTraceRefcntImpl.h

@@ -44,6 +44,7 @@

 class nsTraceRefcntImpl : public nsITraceRefcnt

 {

 public:

+  nsTraceRefcntImpl() {}

   NS_DECL_ISUPPORTS

   NS_DECL_NSITRACEREFCNT

diff --git a/xpcom/glue/nsEnumeratorUtils.cpp b/xpcom/glue/nsEnumeratorUtils.cpp

--- a/xpcom/glue/nsEnumeratorUtils.cpp

+++ b/xpcom/glue/nsEnumeratorUtils.cpp

@@ -52,6 +52,7 @@ class EmptyEnumeratorImpl : public nsISi

                             public nsIStringEnumerator

 {

 public:

+    EmptyEnumeratorImpl() {}

     // nsISupports interface

     NS_DECL_ISUPPORTS_INHERITED  // not really inherited, but no mRefCnt

diff --git a/xpcom/io/nsUnicharInputStream.h b/xpcom/io/nsUnicharInputStream.h

--- a/xpcom/io/nsUnicharInputStream.h

+++ b/xpcom/io/nsUnicharInputStream.h

@@ -51,6 +51,7 @@ class nsSimpleUnicharStreamFactory :

   private nsISimpleUnicharStreamFactory

 {

 public:

+  nsSimpleUnicharStreamFactory() {}

   NS_DECL_ISUPPORTS_INHERITED

   NS_DECL_NSIFACTORY

   NS_DECL_NSISIMPLEUNICHARSTREAMFACTORY

diff --git a/intl/unicharutil/util/nsUnicharUtils.h b/intl/unicharutil/util/nsUnicharUtils.h

--- a/intl/unicharutil/util/nsUnicharUtils.h

+++ b/intl/unicharutil/util/nsUnicharUtils.h

@@ -103,6 +103,7 @@ public:

 class nsASCIICaseInsensitiveStringComparator : public nsStringComparator

 {

 public:

+  nsASCIICaseInsensitiveStringComparator() {}

   virtual int operator() (const PRUnichar*,

                           const PRUnichar*,

                           PRUint32,

diff --git a/toolkit/xre/nsAppRunner.cpp b/toolkit/xre/nsAppRunner.cpp

--- a/toolkit/xre/nsAppRunner.cpp

+++ b/toolkit/xre/nsAppRunner.cpp

@@ -616,6 +616,7 @@ class nsXULAppInfo : public nsIXULAppInf

 {

 public:

+  nsXULAppInfo() {}

   NS_DECL_ISUPPORTS_INHERITED

   NS_DECL_NSIXULAPPINFO

   NS_DECL_NSIXULRUNTIME

diff --git a/embedding/browser/gtk/src/EmbedPrivate.cpp b/embedding/browser/gtk/src/EmbedPrivate.cpp

index 57fd9b1..0052ca7 100644

--- a/embedding/browser/gtk/src/EmbedPrivate.cpp

+++ b/embedding/browser/gtk/src/EmbedPrivate.cpp

@@ -99,6 +99,7 @@ nsIDirectoryServiceProvider *EmbedPrivate::sAppFileLocProvider = nsnull;

 class GTKEmbedDirectoryProvider : public nsIDirectoryServiceProvider2

 {

 public:

+  GTKEmbedDirectoryProvider() {}

   NS_DECL_ISUPPORTS_INHERITED

   NS_DECL_NSIDIRECTORYSERVICEPROVIDER

   NS_DECL_NSIDIRECTORYSERVICEPROVIDER2