cc: Introduce BeginFrame sequence numbers and acknowledgements.

cc/output/gl_renderer_unittest.cc

Index: cc/output/gl_renderer_unittest.cc
diff --git a/cc/output/gl_renderer_unittest.cc b/cc/output/gl_renderer_unittest.cc
index 73e520325d8bc34ce0d486229fe1ad19fab27731..0dc1eed6461c91fb961501351cfb9a48ba25e916 100644
--- a/cc/output/gl_renderer_unittest.cc
+++ b/cc/output/gl_renderer_unittest.cc
@@ -15,6 +15,7 @@
 #include "cc/base/math_util.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
+#include "cc/output/output_surface_frame.h"
 #include "cc/output/overlay_strategy_single_on_top.h"
 #include "cc/output/overlay_strategy_underlay.h"
 #include "cc/output/texture_mailbox_deleter.h"
@@ -352,7 +353,7 @@ class GLRendererWithDefaultHarnessTest : public GLRendererTest {
     renderer_->SetVisible(true);
   }
 
-  void SwapBuffers() { renderer_->SwapBuffers(std::vector<ui::LatencyInfo>()); }
+  void SwapBuffers() { renderer_->SwapBuffers(OutputSurfaceFrame()); }
 
   RendererSettings settings_;
   FakeOutputSurfaceClient output_surface_client_;
@@ -1527,7 +1528,7 @@ class MockOutputSurfaceTest : public GLRendererTest {
     Mock::VerifyAndClearExpectations(output_surface_.get());
   }
 
-  void SwapBuffers() { renderer_->SwapBuffers(std::vector<ui::LatencyInfo>()); }
+  void SwapBuffers() { renderer_->SwapBuffers(OutputSurfaceFrame()); }
 
   void DrawFrame(float device_scale_factor,
                  const gfx::Size& viewport_size,