Moving app_view to extensions.

extensions/browser/api/extensions_api_client.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_BROWSER_API_EXTENSIONS_API_CLIENT_H_
 #define EXTENSIONS_BROWSER_API_EXTENSIONS_API_CLIENT_H_
 
 #include <map>
 
 #include "base/memory/ref_counted.h"
 #include "extensions/browser/api/storage/settings_namespace.h"
 
 class GURL;
 
 template <class T>
 class ObserverListThreadSafe;
 
 namespace content {
 class BrowserContext;
 }
 
 namespace device {
 class HidService;
 }
 
 namespace extensions {
 
+class AppViewGuestDelegate;
 class SettingsObserver;
 class SettingsStorageFactory;
 class ValueStoreCache;
 
 // Allows the embedder of the extensions module to customize its support for
 // API features. The embedder must create a single instance in the browser
 // process. Provides a default implementation that does nothing.
 class ExtensionsAPIClient {
  public:
   // Construction sets the single instance.
@@ skipping 23 matching lines @@
       int guest_instance_id,
       const std::string& guest_extension_id);
 
   // Denies the embedding requested by the <appview> specified by
   // |guest_instance_id|. Returns true if the operation completes successfully.
   virtual bool AppViewInternalDenyRequest(
       content::BrowserContext* browser_context,
       int guest_instance_id,
       const std::string& guest_extension_id);
 
+  // Creates the AppViewGuestDelegate.
+  virtual AppViewGuestDelegate* CreateAppViewGuestDelegate() const;

[Yoyo Zhou, 2014/08/19 21:55:08]

This could be simpler if it returned NULL and the Delegate interface was pure
virtual. (Document that that is possible.)

+
   // Returns the HidService instance for this embedder.
   virtual device::HidService* GetHidService();
 
   virtual void RegisterGuestViewTypes() {}
 
   // NOTE: If this interface gains too many methods (perhaps more than 20) it
   // should be split into one interface per API.
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_EXTENSIONS_API_CLIENT_H_