cc: Implement DelegatingRender::drawFrame() method.

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 a3120416acb253d9fe50f76e97a0131b9bb599ed..655f3b1c80e7ec0ca2b323a04dce25699c50ab6b 100644
--- a/cc/test/fake_output_surface.cc
+++ b/cc/test/fake_output_surface.cc
@@ -7,13 +7,15 @@
 namespace cc {
 
 FakeOutputSurface::FakeOutputSurface(
-    scoped_ptr<WebKit::WebGraphicsContext3D> context3d, bool has_parent) {
+    scoped_ptr<WebKit::WebGraphicsContext3D> context3d, bool has_parent)
+    : num_sent_frames_(0) {
   context3d_ = context3d.Pass();
   capabilities_.has_parent_compositor = has_parent;
 }
 
 FakeOutputSurface::FakeOutputSurface(
-    scoped_ptr<SoftwareOutputDevice> software_device, bool has_parent) {
+    scoped_ptr<SoftwareOutputDevice> software_device, bool has_parent)
+    : num_sent_frames_(0) {
   software_device_ = software_device.Pass();
   capabilities_.has_parent_compositor = has_parent;
 }
@@ -43,6 +45,10 @@ SoftwareOutputDevice* FakeOutputSurface::SoftwareDevice() const {
   return software_device_.get();
 }
 
-void FakeOutputSurface::SendFrameToParentCompositor(const CompositorFrame&) {}
+void FakeOutputSurface::SendFrameToParentCompositor(
+    CompositorFrame& frame) {
+  frame.AssignTo(&last_sent_frame_);
+  ++num_sent_frames_;
+}
 
 }  // namespace cc