ui: Add debug flag to show composited layer borders in ChromeOS UI.

ash/debug.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/debug.h"
 
 #include "ash/shell.h"
 #include "cc/debug/layer_tree_debug_state.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/compositor/compositor.h"
 
 namespace ash {
 namespace debug {
 
 void ToggleShowDebugBorders() {
   aura::Window::Windows root_windows =
       Shell::GetInstance()->GetAllRootWindows();
-  std::unique_ptr<bool> value;
+  std::unique_ptr<cc::DebugBorderTypes> value;
   for (aura::Window::Windows::iterator it = root_windows.begin();
        it != root_windows.end(); ++it) {
     ui::Compositor* compositor = (*it)->GetHost()->compositor();
     cc::LayerTreeDebugState state = compositor->GetLayerTreeDebugState();
     if (!value.get())
-      value.reset(new bool(!state.show_debug_borders));
+      value.reset(new cc::DebugBorderTypes(state.show_debug_borders.flip()));
     state.show_debug_borders = *value.get();
     compositor->SetLayerTreeDebugState(state);
   }
 }
 
 void ToggleShowFpsCounter() {
   aura::Window::Windows root_windows =
       Shell::GetInstance()->GetAllRootWindows();
   std::unique_ptr<bool> value;
   for (aura::Window::Windows::iterator it = root_windows.begin();
@@ skipping 17 matching lines @@
     cc::LayerTreeDebugState state = compositor->GetLayerTreeDebugState();
     if (!value.get())
       value.reset(new bool(!state.show_paint_rects));
     state.show_paint_rects = *value.get();
     compositor->SetLayerTreeDebugState(state);
   }
 }
 
 }  // namespace debug
 }  // namespace ash