Splits debug_commands into aura and non-aura parts

ui/compositor/debug_utils.cc

 // Copyright (c) 2012 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.
 
 #define _USE_MATH_DEFINES // For VC++ to get M_PI. This has to be first.
 
 #include "ui/compositor/debug_utils.h"
 
 #include <stddef.h>
 
@@ skipping 91 matching lines @@
   *out << '\n';
 
   for (size_t i = 0, count = layer->children().size(); i < count; ++i) {
     PrintLayerHierarchyImp(
         layer->children()[i], indent + 3, mouse_location, out);
   }
 }
 
 }  // namespace
 
-void PrintLayerHierarchy(const Layer* layer, gfx::Point mouse_location) {
+void PrintLayerHierarchy(const Layer* layer, const gfx::Point& mouse_location) {
   std::ostringstream out;
   out << "Layer hierarchy:\n";
   PrintLayerHierarchyImp(layer, 0, mouse_location, &out);
   // Error so logs can be collected from end-users.
   LOG(ERROR) << out.str();
 }
 
 }  // namespace ui