cc: Emulate BeginFrame in OutputSurfaces that don't support it natively

cc/test/fake_output_surface.cc

Index: cc/test/fake_output_surface.cc
diff --git a/cc/test/fake_output_surface.cc b/cc/test/fake_output_surface.cc
index c3f3e1a83cd73a4ba320cdac0bf3bd7434af2b56..9ceaddad67117e3b908eb877f9fdf73612af7f08 100644
--- a/cc/test/fake_output_surface.cc
+++ b/cc/test/fake_output_surface.cc
@@ -8,6 +8,7 @@
 #include "base/message_loop.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
+#include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 
@@ -17,7 +18,8 @@ FakeOutputSurface::FakeOutputSurface(
     : OutputSurface(context3d.Pass()),
       num_sent_frames_(0),
       needs_begin_frame_(false),
-      forced_draw_to_software_device_(false) {
+      forced_draw_to_software_device_(false),
+      fake_weak_ptr_factory_(this) {
   if (delegated_rendering) {
     capabilities_.delegated_rendering = true;
     capabilities_.max_frames_pending = 1;
@@ -28,7 +30,8 @@ FakeOutputSurface::FakeOutputSurface(
     scoped_ptr<SoftwareOutputDevice> software_device, bool delegated_rendering)
     : OutputSurface(software_device.Pass()),
       num_sent_frames_(0),
-      forced_draw_to_software_device_(false) {
+      forced_draw_to_software_device_(false),
+      fake_weak_ptr_factory_(this) {
   if (delegated_rendering) {
     capabilities_.delegated_rendering = true;
     capabilities_.max_frames_pending = 1;
@@ -41,7 +44,8 @@ FakeOutputSurface::FakeOutputSurface(
     bool delegated_rendering)
     : OutputSurface(context3d.Pass(), software_device.Pass()),
       num_sent_frames_(0),
-      forced_draw_to_software_device_(false) {
+      forced_draw_to_software_device_(false),
+      fake_weak_ptr_factory_(this) {
   if (delegated_rendering) {
     capabilities_.delegated_rendering = true;
     capabilities_.max_frames_pending = 1;
@@ -56,6 +60,7 @@ void FakeOutputSurface::SwapBuffers(CompositorFrame* frame) {
     frame->AssignTo(&last_sent_frame_);
     ++num_sent_frames_;
     PostSwapBuffersComplete();
+    DidSwapBuffers();
   } else {
     OutputSurface::SwapBuffers(frame);
     frame->AssignTo(&last_sent_frame_);
@@ -65,12 +70,23 @@ void FakeOutputSurface::SwapBuffers(CompositorFrame* frame) {
 
 void FakeOutputSurface::SetNeedsBeginFrame(bool enable) {
   needs_begin_frame_ = enable;
+  OutputSurface::SetNeedsBeginFrame(enable);
+
+  // If there is not BeginFrame emulation from the FrameRateController,
+  // then we just post a BeginFrame to emulate it as part of the test.
+  if (enable && !frame_rate_controller_) {
+    base::MessageLoop::current()->PostDelayedTask(
+        FROM_HERE, base::Bind(&FakeOutputSurface::OnBeginFrame,
+                              fake_weak_ptr_factory_.GetWeakPtr()),
+        base::TimeDelta::FromMilliseconds(16));
+  }
 }
 
-void FakeOutputSurface::BeginFrame(base::TimeTicks frame_time) {
-  client_->BeginFrame(frame_time);
+void FakeOutputSurface::OnBeginFrame() {
+  OutputSurface::BeginFrame(base::TimeTicks::Now());
 }
 
+
 bool FakeOutputSurface::ForcedDrawToSoftwareDevice() const {
   return forced_draw_to_software_device_;
 }