cc: Remove FakeThread, use SingleThreadTaskRunner in scheduling classes.

cc/output/output_surface.cc

Index: cc/output/output_surface.cc
diff --git a/cc/output/output_surface.cc b/cc/output/output_surface.cc
index 610aebff37890009ee6901cbf3d1cb69e781cb07..160f86dcfb0bf22c9a98201b27c863e9391365c9 100644
--- a/cc/output/output_surface.cc
+++ b/cc/output/output_surface.cc
@@ -91,15 +91,15 @@ OutputSurface::OutputSurface(
 }
 
 void OutputSurface::InitializeBeginFrameEmulation(
-    Thread* thread,
+    base::SingleThreadTaskRunner* task_runner,
     bool throttle_frame_production,
     base::TimeDelta interval) {
   if (throttle_frame_production){
     frame_rate_controller_.reset(
         new FrameRateController(
-            DelayBasedTimeSource::Create(interval, thread)));
+            DelayBasedTimeSource::Create(interval, task_runner)));
   } else {
-    frame_rate_controller_.reset(new FrameRateController(thread));
+    frame_rate_controller_.reset(new FrameRateController(task_runner));
   }
 
   frame_rate_controller_->SetClient(this);