[NOT FOR COMMIT] Hacks to get hardware canvas

cc/trees/thread_proxy.cc

Index: cc/trees/thread_proxy.cc
diff --git a/cc/trees/thread_proxy.cc b/cc/trees/thread_proxy.cc
index e60a29dc48cfe1f007881c85e917875a19cce1fb..2d3c0f9d1b9b330a1816f8acad0b1a0665ff1414 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -311,6 +311,11 @@ void ThreadProxy::DoCreateAndInitializeOutputSurface() {
   OnOutputSurfaceInitializeAttempted(success, capabilities);
 }
 
+void ThreadProxy::SetRendererCapabilitiesMainThreadCopy(
+    const RendererCapabilities& capabilities) {
+  renderer_capabilities_main_thread_copy_ = capabilities;
+}
+
 void ThreadProxy::OnOutputSurfaceInitializeAttempted(
     bool success,
     const RendererCapabilities& capabilities) {
@@ -318,7 +323,7 @@ void ThreadProxy::OnOutputSurfaceInitializeAttempted(
   DCHECK(layer_tree_host());
 
   if (success) {
-    renderer_capabilities_main_thread_copy_ = capabilities;
+    SetRendererCapabilitiesMainThreadCopy(capabilities);
   }
 
   LayerTreeHost::CreateResult result =
@@ -380,10 +385,22 @@ void ThreadProxy::SetNeedsCommit() {
     return;
   TRACE_EVENT0("cc", "ThreadProxy::SetNeedsCommit");
   commit_requested_ = true;
-
   SendCommitRequestToImplThreadIfNeeded();
 }
 
+void ThreadProxy::UpdateRendererCapabilitiesOnImplThread() {
+  DCHECK(IsImplThread());
+  // We don't clear PrioritizedResourceManager.
+  DCHECK(layer_tree_host_impl_->settings().impl_side_painting);
+
+  Proxy::MainThreadTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&ThreadProxy::SetRendererCapabilitiesMainThreadCopy,
+                 main_thread_weak_ptr_,
+                 layer_tree_host_impl_->GetRendererCapabilities()
+                     .MainThreadCapabilities()));
+}
+
 void ThreadProxy::DidLoseOutputSurfaceOnImplThread() {
   DCHECK(IsImplThread());
   TRACE_EVENT0("cc", "ThreadProxy::DidLoseOutputSurfaceOnImplThread");