Eliminate ash::internal namespace

ash/wm/event_client_impl.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.
 
 #include "ash/wm/event_client_impl.h"
 
 #include "ash/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ui/aura/window.h"
 #include "ui/keyboard/keyboard_util.h"
 
 namespace ash {
-namespace internal {
 
 EventClientImpl::EventClientImpl() {
 }
 
 EventClientImpl::~EventClientImpl() {
 }
 
 bool EventClientImpl::CanProcessEventsWithinSubtree(
     const aura::Window* window) const {
   const aura::Window* root_window = window ? window->GetRootWindow() : NULL;
@@ skipping 24 matching lines @@
     can_process_events |= (window->Contains(virtual_keyboard_container) ||
                            virtual_keyboard_container->Contains(window));
   }
   return can_process_events;
 }
 
 ui::EventTarget* EventClientImpl::GetToplevelEventTarget() {
   return Shell::GetInstance();
 }
 
-}  // namespace internal
 }  // namespace ash