cc: Clean up OutputSurfaceClient.

cc/output/output_surface_unittest.cc

Index: cc/output/output_surface_unittest.cc
diff --git a/cc/output/output_surface_unittest.cc b/cc/output/output_surface_unittest.cc
index 053f75d4761a905f182e5449328d14325c72dcf1..2c40578117a2b27e0374bebb14f4f8142fad3027 100644
--- a/cc/output/output_surface_unittest.cc
+++ b/cc/output/output_surface_unittest.cc
@@ -36,7 +36,7 @@ class TestOutputSurface : public OutputSurface {
                const gfx::ColorSpace& color_space,
                bool has_alpha) override {}
   void SwapBuffers(OutputSurfaceFrame frame) override {
-    client_->DidSwapBuffersComplete();
+    client_->DidReceiveSwapBuffersAck();
   }
   uint32_t GetFramebufferCopyTextureFormat() override {
     // TestContextProvider has no real framebuffer, just use RGB.
@@ -51,7 +51,9 @@ class TestOutputSurface : public OutputSurface {
   bool HasExternalStencilTest() const override { return false; }
   void ApplyExternalStencil() override {}
 
-  void OnSwapBuffersCompleteForTesting() { client_->DidSwapBuffersComplete(); }
+  void OnSwapBuffersCompleteForTesting() {
+    client_->DidReceiveSwapBuffersAck();
+  }
 
  protected:
 };