cc: Set tile manager memory policy in initializeRenderer.

cc/trees/thread_proxy.cc

 // Copyright 2011 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/thread_proxy.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "cc/base/thread.h"
@@ skipping 590 matching lines @@
 
   begin_frame_completion_event_on_impl_thread_ = completion;
 }
 
 void ThreadProxy::ScheduledActionBeginFrame() {
   TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionBeginFrame");
   scoped_ptr<BeginFrameAndCommitState> begin_frame_state(
       new BeginFrameAndCommitState);
   begin_frame_state->monotonic_frame_begin_time = base::TimeTicks::Now();
   begin_frame_state->scroll_info = layer_tree_host_impl_->ProcessScrollDeltas();
-  DCHECK_GT(layer_tree_host_impl_->memory_allocation_limit_bytes(), 0u);

[ccameron, 2013/04/30 18:52:00]

This assert seems important to me. We shouldn't be trying to draw a frame with
no memory available (the GpuMemoryManager always gives out at least some memory)

   begin_frame_state->memory_allocation_limit_bytes =
       layer_tree_host_impl_->memory_allocation_limit_bytes();
   Proxy::MainThread()->PostTask(base::Bind(&ThreadProxy::BeginFrame,
                                            main_thread_weak_ptr_,
                                            base::Passed(&begin_frame_state)));
 
   if (begin_frame_completion_event_on_impl_thread_) {
     begin_frame_completion_event_on_impl_thread_->Signal();
     begin_frame_completion_event_on_impl_thread_ = NULL;
   }
@@ skipping 730 matching lines @@
 
 void ThreadProxy::DidReceiveLastInputEventForVSync(
     base::TimeTicks frame_time) {
   if (render_vsync_notification_enabled_) {
     TRACE_EVENT0("cc", "ThreadProxy::DidReceiveLastInputEventForVSync");
     DidVSync(frame_time);
   }
 }
 
 }  // namespace cc