Clear Image Decode Cache on Navigation

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 2326 matching lines @@
   client_->SetNeedsCommitOnImplThread();
 }
 
 std::vector<base::Closure>
 LayerTreeHostImpl::TakeCompletedImageDecodeCallbacks() {
   auto result = std::move(completed_image_decode_callbacks_);
   completed_image_decode_callbacks_.clear();
   return result;
 }
 
+void LayerTreeHostImpl::ClearImageCacheOnNavigation() {
+  if (image_decode_cache_)
+    image_decode_cache_->ClearCache();
+}
+
 void LayerTreeHostImpl::DidChangeScrollbarVisibility() {
   // Need a commit since input handling for scrollbars is handled in Blink so
   // we need to communicate to Blink when the compositor shows/hides the
   // scrollbars.
   client_->SetNeedsCommitOnImplThread();
 }
 
 void LayerTreeHostImpl::CleanUpTileManagerAndUIResources() {
   ClearUIResources();
   tile_manager_.FinishTasksAndCleanUp();
@@ skipping 1914 matching lines @@
 }
 
 void LayerTreeHostImpl::UpdateScrollSourceInfo(bool is_wheel_scroll) {
   if (is_wheel_scroll)
     has_scrolled_by_wheel_ = true;
   else
     has_scrolled_by_touch_ = true;
 }
 
 }  // namespace cc