cc: Make separate interface for BeginFrame ipc from OutputSurface

content/browser/android/in_process/synchronous_compositor_output_surface.cc

Index: content/browser/android/in_process/synchronous_compositor_output_surface.cc
diff --git a/content/browser/android/in_process/synchronous_compositor_output_surface.cc b/content/browser/android/in_process/synchronous_compositor_output_surface.cc
index 1c87cc34dac38c65d67940bf7ef9c3a583b07bfc..2438d65db7fb878969dfe4aa4b0a8c2d05a70b8e 100644
--- a/content/browser/android/in_process/synchronous_compositor_output_surface.cc
+++ b/content/browser/android/in_process/synchronous_compositor_output_surface.cc
@@ -6,11 +6,11 @@
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
-#include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/context_provider.h"
 #include "cc/output/output_surface_client.h"
 #include "cc/output/software_output_device.h"
+#include "content/browser/android/in_process/synchronous_compositor_external_begin_frame_source.h"
 #include "content/browser/android/in_process/synchronous_compositor_impl.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/public/browser/browser_thread.h"
@@ -76,8 +76,6 @@ SynchronousCompositorOutputSurface::SynchronousCompositorOutputSurface(
     : cc::OutputSurface(
           scoped_ptr<cc::SoftwareOutputDevice>(new SoftwareDevice(this))),
       routing_id_(routing_id),
-      needs_begin_frame_(false),
-      invoking_composite_(false),
       current_sw_canvas_(NULL),
       memory_policy_(0),
       output_surface_client_(NULL),
@@ -124,14 +122,6 @@ void SynchronousCompositorOutputSurface::Reshape(
   // Intentional no-op: surface size is controlled by the embedder.
 }
 
-void SynchronousCompositorOutputSurface::SetNeedsBeginFrame(bool enable) {
-  DCHECK(CalledOnValidThread());
-  needs_begin_frame_ = enable;
-  SynchronousCompositorOutputSurfaceDelegate* delegate = GetDelegate();
-  if (delegate && !invoking_composite_)
-    delegate->SetContinuousInvalidate(needs_begin_frame_);
-}
-
 void SynchronousCompositorOutputSurface::SwapBuffers(
     cc::CompositorFrame* frame) {
   DCHECK(CalledOnValidThread());
@@ -223,9 +213,8 @@ void SynchronousCompositorOutputSurface::InvokeComposite(
     gfx::Rect viewport_rect_for_tile_priority,
     gfx::Transform transform_for_tile_priority,
     bool hardware_draw) {
-  DCHECK(!invoking_composite_);
   DCHECK(!frame_holder_.get());
-  base::AutoReset<bool> invoking_composite_resetter(&invoking_composite_, true);
+  DCHECK(begin_frame_source_);
 
   gfx::Transform adjusted_transform = transform;
   AdjustTransform(&adjusted_transform, viewport);
@@ -236,7 +225,8 @@ void SynchronousCompositorOutputSurface::InvokeComposite(
                              transform_for_tile_priority,
                              !hardware_draw);
   SetNeedsRedrawRect(gfx::Rect(viewport.size()));
-  client_->BeginFrame(cc::BeginFrameArgs::CreateForSynchronousCompositor());
+
+  begin_frame_source_->BeginFrame();
 
   // After software draws (which might move the viewport arbitrarily), restore
   // the previous hardware viewport to allow CC's tile manager to prioritize
@@ -260,10 +250,6 @@ void SynchronousCompositorOutputSurface::InvokeComposite(
 
   if (frame_holder_.get())
     client_->DidSwapBuffersComplete();
-
-  SynchronousCompositorOutputSurfaceDelegate* delegate = GetDelegate();
-  if (delegate)
-    delegate->SetContinuousInvalidate(needs_begin_frame_);
 }
 
 void SynchronousCompositorOutputSurface::ReturnResources(