cc: Rename SwapBuffers on CompositorFrameSink to SubmitCompositorFrame

cc/output/compositor_frame_sink_unittest.cc

Index: cc/output/compositor_frame_sink_unittest.cc
diff --git a/cc/output/compositor_frame_sink_unittest.cc b/cc/output/compositor_frame_sink_unittest.cc
index 80d3c6010caeeb0899073699598488ada41c036a..4087c5c68a3237b819ffcf304e7c72e0625a13e1 100644
--- a/cc/output/compositor_frame_sink_unittest.cc
+++ b/cc/output/compositor_frame_sink_unittest.cc
@@ -23,13 +23,9 @@ class TestCompositorFrameSink : public CompositorFrameSink {
       : CompositorFrameSink(std::move(context_provider),
                             std::move(worker_context_provider)) {}
 
-  void SwapBuffers(CompositorFrame frame) override {
-    client_->DidSwapBuffersComplete();
+  void SubmitCompositorFrame(CompositorFrame frame) override {
+    client_->DidReceiveCompositorFrameAck();
   }
-
-  void OnSwapBuffersCompleteForTesting() { client_->DidSwapBuffersComplete(); }
-
- protected:
 };
 
 TEST(CompositorFrameSinkTest, ContextLossInformsClient) {