Don't leak CopyResult textures.

cc/output/copy_output_result.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/copy_output_result.h"
 
 #include "base/logging.h"
 #include "cc/resources/texture_mailbox.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace cc {
 
 CopyOutputResult::CopyOutputResult() {}
 
 CopyOutputResult::CopyOutputResult(scoped_ptr<SkBitmap> bitmap)
     : size_(bitmap->width(), bitmap->height()),
       bitmap_(bitmap.Pass()) {
   DCHECK(bitmap_);
 }
 
 CopyOutputResult::CopyOutputResult(gfx::Size size,
                                    scoped_ptr<TextureMailbox> texture_mailbox)
     : size_(size),
       texture_mailbox_(texture_mailbox.Pass()) {
   DCHECK(texture_mailbox_);
   DCHECK(texture_mailbox_->IsTexture());
 }
 
-CopyOutputResult::~CopyOutputResult() {}
+CopyOutputResult::~CopyOutputResult() {
+  if (texture_mailbox_)
+    texture_mailbox_->RunReleaseCallback(0, false);
+}
 
 scoped_ptr<SkBitmap> CopyOutputResult::TakeBitmap() {
   return bitmap_.Pass();
 }
 
 scoped_ptr<TextureMailbox> CopyOutputResult::TakeTexture() {
   return texture_mailbox_.Pass();
 }
 
 }  // namespace cc