Use the scheduler to drive the Sky compositor

sky/compositor/surface_holder.cc

 // Copyright 2014 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 "sky/compositor/surface_holder.h"
 
 #include "base/bind.h"
+#include "base/message_loop/message_loop.h"
 #include "mojo/converters/geometry/geometry_type_converters.h"
 #include "mojo/public/cpp/application/connect.h"
 #include "mojo/public/interfaces/application/shell.mojom.h"
 #include "sky/compositor/surface_allocator.h"
 
 namespace sky {
 
 SurfaceHolder::Client::~Client() {
 }
 
@@ skipping 33 matching lines @@
 
   client_->OnSurfaceIdAvailable(surface_id_.Clone());
 }
 
 void SurfaceHolder::ReturnResources(
     mojo::Array<mojo::ReturnedResourcePtr> resources) {
   // TODO(abarth): The surface service shouldn't spam us with empty calls.
   if (!resources.size())
     return;
   client_->ReturnResources(resources.Pass());
-  client_->OnReadyForNextFrame();
 }
 
 void SurfaceHolder::OnSurfaceConnectionCreated(mojo::SurfacePtr surface,
                                                uint32_t id_namespace) {
   surface_ = surface.Pass();
   surface_.set_client(this);
   surface_allocator_.reset(new SurfaceAllocator(id_namespace));
-
-  client_->OnReadyForNextFrame();
 }
 
 }  // namespace sky