Switch to standard integer types in ash/.

ash/shell/content/shell_content_state_impl.h

 // Copyright 2015 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.
 
 #ifndef ASH_SHELL_CONTENT_SHELL_CONTENT_STATE_IMPL_H_
 #define ASH_SHELL_CONTENT_SHELL_CONTENT_STATE_IMPL_H_
 
 #include "ash/content/shell_content_state.h"
+#include "base/macros.h"
 
 namespace ash {
 
 class ShellContentStateImpl : public ShellContentState {
  public:
   explicit ShellContentStateImpl(content::BrowserContext* context);
 
  private:
   ~ShellContentStateImpl() override;
 
   // Overridden from ShellContentState:
   content::BrowserContext* GetActiveBrowserContext() override;
   content::BrowserContext* GetBrowserContextByIndex(UserIndex index) override;
   content::BrowserContext* GetBrowserContextForWindow(
       aura::Window* window) override;
   content::BrowserContext* GetUserPresentingBrowserContextForWindow(
       aura::Window* window) override;
 
   content::BrowserContext* browser_context_;
 
   DISALLOW_COPY_AND_ASSIGN(ShellContentStateImpl);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SHELL_CONTENT_SHELL_CONTENT_STATE_IMPL_H_