Cache image data objects.

webkit/plugins/ppapi/ppb_image_data_impl.cc

 // Copyright (c) 2012 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 "webkit/plugins/ppapi/ppb_image_data_impl.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/logging.h"
@@ skipping 114 matching lines @@
 }
 
 SkCanvas* PPB_ImageData_Impl::GetCanvas() {
   return backend_->GetCanvas();
 }
 
 const SkBitmap* PPB_ImageData_Impl::GetMappedBitmap() const {
   return backend_->GetMappedBitmap();
 }
 
-void PPB_ImageData_Impl::Swap(PPB_ImageData_Impl* other) {
-  backend_.swap(other->backend_);
-  std::swap(other->format_, format_);
-  std::swap(other->width_, width_);
-  std::swap(other->height_, height_);
-}
-
 // ImageDataPlatformBackend --------------------------------------------------
 
 ImageDataPlatformBackend::ImageDataPlatformBackend() {
 }
 
 ImageDataPlatformBackend::~ImageDataPlatformBackend() {
 }
 
 bool ImageDataPlatformBackend::Init(PPB_ImageData_Impl* impl,
                                      PP_ImageDataFormat format,
@@ skipping 134 matching lines @@
 
 const SkBitmap* ImageDataNaClBackend::GetMappedBitmap() const {
   if (!IsMapped())
     return NULL;
   return &skia_bitmap_;
 }
 
 }  // namespace ppapi
 }  // namespace webkit