Remove app_shell chrome.shell API and ShellAppWindow

extensions/shell/renderer/shell_dispatcher_delegate.h

-// Copyright 2014 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 EXTENSIONS_SHELL_RENDERER_SHELL_DISPATCHER_DELEGATE_H_
-#define EXTENSIONS_SHELL_RENDERER_SHELL_DISPATCHER_DELEGATE_H_
-
-#include "base/macros.h"
-#include "extensions/renderer/default_dispatcher_delegate.h"
-
-namespace extensions {
-
-// app_shell's implementation of DispatcherDelegate. This inherits the behavior
-// of the default delegate while augmenting its own script resources and native
-// native handlers.
-class ShellDispatcherDelegate : public DefaultDispatcherDelegate {
- public:
-  ShellDispatcherDelegate();
-  virtual ~ShellDispatcherDelegate();
-
-  // DispatcherDelegate implementation.
-  virtual void RegisterNativeHandlers(Dispatcher* dispatcher,
-                                      ModuleSystem* module_system,
-                                      ScriptContext* context) OVERRIDE;
-  virtual void PopulateSourceMap(ResourceBundleSourceMap* source_map) OVERRIDE;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ShellDispatcherDelegate);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_SHELL_RENDERER_SHELL_DISPATCHER_DELEGATE_H_