cc: Update Main RendererCapabilities on DeferredInitialize

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 cdf05c01db9d9506caf135323b967cf6855be1f7..98e5d61f20e20dc236b1a20d882ccf498937ade2 100644
--- a/cc/trees/thread_proxy.cc
+++ b/cc/trees/thread_proxy.cc
@@ -338,6 +338,11 @@ void ThreadProxy::DoCreateAndInitializeOutputSurface() {
   OnOutputSurfaceInitializeAttempted(success, capabilities);
 }
 
+void ThreadProxy::SetRendererCapabilitiesMainThreadCopy(
+    const RendererCapabilities& capabilities) {
+  main().renderer_capabilities_main_thread_copy = capabilities;
+}
+
 void ThreadProxy::OnOutputSurfaceInitializeAttempted(
     bool success,
     const RendererCapabilities& capabilities) {
@@ -411,6 +416,17 @@ void ThreadProxy::SetNeedsCommit() {
   SendCommitRequestToImplThreadIfNeeded();
 }
 
+void ThreadProxy::UpdateRendererCapabilitiesOnImplThread() {
+  DCHECK(IsImplThread());
+  Proxy::MainThreadTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&ThreadProxy::SetRendererCapabilitiesMainThreadCopy,
+                 main_thread_weak_ptr_,
+                 impl()
+                     .layer_tree_host_impl->GetRendererCapabilities()
+                     .MainThreadCapabilities()));
+}
+
 void ThreadProxy::DidLoseOutputSurfaceOnImplThread() {
   TRACE_EVENT0("cc", "ThreadProxy::DidLoseOutputSurfaceOnImplThread");
   DCHECK(IsImplThread());