Add delegate to install web_contents helpers for MimeHandlerView.

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 "base/memory/scoped_ptr.h"
 #include "extensions/browser/api/storage/settings_namespace.h"
 
 class GURL;
 
 template <class T>
 class ObserverListThreadSafe;
 
 namespace content {
 class BrowserContext;
 }
 
 namespace extensions {
 
 class AppViewGuestDelegate;
+class MimeHandlerViewGuest;
+class MimeHandlerViewGuestDelegate;
 class WebViewGuest;
 class WebViewGuestDelegate;
 class WebViewPermissionHelper;
 class WebViewPermissionHelperDelegate;
 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
@@ skipping 15 matching lines @@
   // to |caches|. By default adds nothing.
   virtual void AddAdditionalValueStoreCaches(
       content::BrowserContext* context,
       const scoped_refptr<SettingsStorageFactory>& factory,
       const scoped_refptr<ObserverListThreadSafe<SettingsObserver> >& observers,
       std::map<settings_namespace::Namespace, ValueStoreCache*>* caches);
 
   // Creates the AppViewGuestDelegate.
   virtual AppViewGuestDelegate* CreateAppViewGuestDelegate() const;
 
+  // Creates a delegate for MimeHandlerViewGuest.
+  virtual scoped_ptr<MimeHandlerViewGuestDelegate>
+      CreateMimeHandlerViewGuestDelegate(MimeHandlerViewGuest* guest) const;
+
   // Returns a delegate for some of WebViewGuest's behavior. The caller owns the
   // returned WebViewGuestDelegate.
   virtual WebViewGuestDelegate* CreateWebViewGuestDelegate (
       WebViewGuest* web_view_guest) const;
 
   // Returns a delegate for some of WebViewPermissionHelper's behavior. The
   // caller owns the returned WebViewPermissionHelperDelegate.
   virtual WebViewPermissionHelperDelegate*
       CreateWebViewPermissionHelperDelegate (
           WebViewPermissionHelper* web_view_permission_helper) const;
 
   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_