Clear Image Decode Cache on Navigation

cc/trees/layer_tree_host_impl.h

 // 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.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <stddef.h>
 
 #include <bitset>
@@ skipping 579 matching lines @@
 
   void SetLayerTreeMutator(std::unique_ptr<LayerTreeMutator> mutator);
   LayerTreeMutator* mutator() { return mutator_.get(); }
 
   LayerImpl* ViewportMainScrollLayer();
 
   void QueueImageDecode(sk_sp<const SkImage> image,
                         const base::Callback<void(bool)>& embedder_callback);
   std::vector<base::Closure> TakeCompletedImageDecodeCallbacks();
 
+  void ClearImageCacheOnNavigation();
+
  protected:
   LayerTreeHostImpl(
       const LayerTreeSettings& settings,
       LayerTreeHostImplClient* client,
       TaskRunnerProvider* task_runner_provider,
       RenderingStatsInstrumentation* rendering_stats_instrumentation,
       TaskGraphRunner* task_graph_runner,
       std::unique_ptr<MutatorHost> mutator_host,
       int id,
       scoped_refptr<base::SequencedTaskRunner> image_worker_task_runner);
@@ skipping 249 matching lines @@
   // thread.
   bool has_scrolled_by_wheel_;
   bool has_scrolled_by_touch_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_