Make deferred image decoding default to on.

Source/platform/graphics/DeferredImageDecoder.cpp

 /*
  * Copyright (C) 2012 Google 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 22 matching lines @@
 
 namespace blink {
 
 namespace {
 
 // URI label for SkDiscardablePixelRef.
 const char labelDiscardable[] = "discardable";
 
 } // namespace
 
-bool DeferredImageDecoder::s_enabled = false;
+bool DeferredImageDecoder::s_enabled = true;
 
 DeferredImageDecoder::DeferredImageDecoder(PassOwnPtr<ImageDecoder> actualDecoder)
     : m_allDataReceived(false)
     , m_lastDataSize(0)
     , m_actualDecoder(actualDecoder)
     , m_repetitionCount(cAnimationNone)
     , m_hasColorProfile(false)
 {
 }
 
@@ skipping 236 matching lines @@
     return bitmap;
 }
 
 bool DeferredImageDecoder::hotSpot(IntPoint& hotSpot) const
 {
     // TODO: Implement.
     return m_actualDecoder ? m_actualDecoder->hotSpot(hotSpot) : false;
 }
 
 } // namespace blink