High CPU and increased memory usage fix for high-res (GIF, WEBP...) animations.

third_party/WebKit/Source/platform/graphics/FrameData.cpp

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 26 matching lines @@
     , m_hasAlpha(true)
     , m_frameBytes(0)
 {
 }
 
 FrameData::~FrameData()
 {
     clear(true);
 }
 
-bool FrameData::clear(bool clearMetadata)
+void FrameData::clear(bool clearMetadata)
 {
     if (clearMetadata)
         m_haveMetadata = false;
 
     m_orientation = DefaultImageOrientation;
     m_frameBytes = 0;
-
-    if (m_frame) {
-        m_frame.clear();
-        return true;
-    }
-    return false;
 }
 
 } // namespace blink