Fix non-anti-aliased frame update.

third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h

Index: third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
diff --git a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
index fe1c8b329f37be4a836d9fe9f884a0815fbfba40..dbf89a5ac459e1d50395be2218465b50ce037c72 100644
--- a/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
+++ b/third_party/WebKit/Source/platform/graphics/gpu/DrawingBuffer.h
@@ -168,7 +168,7 @@ class PLATFORM_EXPORT DrawingBuffer
   }
 
   // Returns false if the contents had previously been marked as changed and
-  // have not yet been committed.
+  // have not yet been resolved.
   bool markContentsChanged();
   void setBufferClearNeeded(bool);
   bool bufferClearNeeded() const;
@@ -342,9 +342,12 @@ class PLATFORM_EXPORT DrawingBuffer
   // The same as reset(), but leaves GL state dirty.
   bool resizeFramebufferInternal(const IntSize&);
 
-  // The same as commit(), but leaves GL state dirty.
+  // The same as resolveAndBindForReadAndDraw(), but leaves GL state dirty.
   void resolveMultisampleFramebufferInternal();
 
+  // Resolves m_multisampleFBO into m_fbo, if multisampling.
+  void resolveIfNeeded();
+
   bool prepareTextureMailboxInternal(
       cc::TextureMailbox* outMailbox,
       std::unique_ptr<cc::SingleReleaseCallback>* outReleaseCallback,
@@ -481,9 +484,9 @@ class PLATFORM_EXPORT DrawingBuffer
   // buffer.
   bool m_contentsChanged = true;
 
-  // True if commit() has been called since the last time markContentsChanged()
-  // had been called.
-  bool m_contentsChangeCommitted = false;
+  // True if resolveIfNeeded() has been called since the last time
+  // markContentsChanged() had been called.
+  bool m_contentsChangeResolved = false;
   bool m_bufferClearNeeded = false;
 
   // Whether the client wants a depth or stencil buffer.