Remove dispatcher in test compositor

ui/gfx/compositor/test/test_compositor_host_win.cc

Index: ui/gfx/compositor/test/test_compositor_host_win.cc
diff --git a/ui/gfx/compositor/test/test_compositor_host_win.cc b/ui/gfx/compositor/test/test_compositor_host_win.cc
index 68da20999e2663dbd7717afba821c7db35d70f53..62a05dd3444dd5fb71ccbdcb1ef5f80f8e529ee6 100644
--- a/ui/gfx/compositor/test/test_compositor_host_win.cc
+++ b/ui/gfx/compositor/test/test_compositor_host_win.cc
@@ -24,13 +24,6 @@ class TestCompositorHostWin : public TestCompositorHost,
     DestroyWindow(hwnd());
   }
 
-  // Overridden from MessageLoop::Dispatcher:
-  virtual bool Dispatch(const base::NativeEvent& msg) {
-    TranslateMessage(&msg);
-    DispatchMessage(&msg);
-    return true;
-  }
-
   // Overridden from TestCompositorHost:
   virtual void Show() OVERRIDE {
     ShowWindow(hwnd(), SW_SHOWNORMAL);