Add decode() functionality to image elements.

cc/trees/proxy_impl.cc

 // Copyright 2015 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/proxy_impl.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 419 matching lines @@
 void ProxyImpl::OnDrawForCompositorFrameSink(bool resourceless_software_draw) {
   DCHECK(IsImplThread());
   scheduler_->OnDrawForCompositorFrameSink(resourceless_software_draw);
 }
 
 void ProxyImpl::NeedsImplSideInvalidation() {
   DCHECK(IsImplThread());
   scheduler_->SetNeedsImplSideInvalidation();
 }
 
+void ProxyImpl::NotifyImageDecodeRequestFinished() {
+  DCHECK(IsImplThread());
+  SetNeedsCommitOnImplThread();
+}
+
 void ProxyImpl::WillBeginImplFrame(const BeginFrameArgs& args) {
   DCHECK(IsImplThread());
   layer_tree_host_impl_->WillBeginImplFrame(args);
 }
 
 void ProxyImpl::DidFinishImplFrame() {
   DCHECK(IsImplThread());
   layer_tree_host_impl_->DidFinishImplFrame();
 }
 
@@ skipping 199 matching lines @@
 ProxyImpl::BlockedMainCommitOnly& ProxyImpl::blocked_main_commit() {
   DCHECK(IsMainThreadBlocked() && commit_completion_event_);
   return main_thread_blocked_commit_vars_unsafe_;
 }
 
 base::SingleThreadTaskRunner* ProxyImpl::MainThreadTaskRunner() {
   return task_runner_provider_->MainThreadTaskRunner();
 }
 
 }  // namespace cc