cc: Send shared variables between main and impl side using the channel

cc/trees/threaded_channel.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/threaded_channel.h"
 
 #include "base/bind.h"
 #include "base/single_thread_task_runner.h"
 #include "base/trace_event/trace_event.h"
 
@@ skipping 74 matching lines @@
       FROM_HERE, base::Bind(&ProxyImpl::BeginMainFrameAbortedOnImpl,
                             proxy_impl_->GetImplWeakPtr(), reason));
 }
 
 void ThreadedChannel::SetNeedsRedrawOnImpl(const gfx::Rect& damage_rect) {
   ImplThreadTaskRunner()->PostTask(
       FROM_HERE, base::Bind(&ProxyImpl::SetNeedsRedrawOnImpl,
                             proxy_impl_->GetImplWeakPtr(), damage_rect));
 }
 
-void ThreadedChannel::StartCommitOnImpl(CompletionEvent* completion) {
+void ThreadedChannel::StartCommitOnImpl(CompletionEvent* completion,
+                                        LayerTreeHost* layer_tree_host,
+                                        bool hold_commit_for_activation) {
   ImplThreadTaskRunner()->PostTask(
-      FROM_HERE, base::Bind(&ProxyImpl::StartCommitOnImpl,
+      FROM_HERE,
+      base::Bind(&ProxyImpl::StartCommitOnImpl, proxy_impl_->GetImplWeakPtr(),
+                 completion, layer_tree_host, hold_commit_for_activation));
+}
+
+void ThreadedChannel::InitializeImplOnImpl(CompletionEvent* completion,
+                                           LayerTreeHost* layer_tree_host) {
+  ImplThreadTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&ProxyImpl::InitializeImplOnImpl,
+                 base::Unretained(proxy_impl_), completion, layer_tree_host));
+}
+
+void ThreadedChannel::LayerTreeHostClosedOnImpl(CompletionEvent* completion) {
+  ImplThreadTaskRunner()->PostTask(
+      FROM_HERE, base::Bind(&ProxyImpl::LayerTreeHostClosedOnImpl,
                             proxy_impl_->GetImplWeakPtr(), completion));
+  proxy_impl_ = nullptr;
 }
 
 void ThreadedChannel::SetVisibleOnImpl(CompletionEvent* completion,
                                        bool visible) {
   ImplThreadTaskRunner()->PostTask(
       FROM_HERE,
       base::Bind(&ProxyImpl::SetVisibleOnImpl, proxy_impl_->GetImplWeakPtr(),
                  completion, visible));
 }
 
@@ skipping 102 matching lines @@
 
 base::SingleThreadTaskRunner* ThreadedChannel::MainThreadTaskRunner() const {
   return main_task_runner_.get();
 }
 
 base::SingleThreadTaskRunner* ThreadedChannel::ImplThreadTaskRunner() const {
   return impl_task_runner_.get();
 }
 
 }  // namespace cc