Refactoring: de-couple Extensions from "script injection System" [render side] : 1

extensions/browser/guest_view/web_view/web_view_guest.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_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_
 
 #include <vector>
 
+#include "base/callback.h"
 #include "base/observer_list.h"
 #include "content/public/browser/javascript_dialog_manager.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/guest_view/guest_view.h"
 #include "extensions/browser/guest_view/web_view/javascript_dialog_helper.h"
 #include "extensions/browser/guest_view/web_view/web_view_find_helper.h"
 #include "extensions/browser/guest_view/web_view/web_view_guest_delegate.h"
 #include "extensions/browser/guest_view/web_view/web_view_permission_helper.h"
 #include "extensions/browser/guest_view/web_view/web_view_permission_types.h"
@@ skipping 29 matching lines @@
                                              std::string* partition_domain,
                                              std::string* partition_name,
                                              bool* in_memory);
 
   // Returns guestview::kInstanceIDNone if |contents| does not correspond to a
   // WebViewGuest.
   static int GetViewInstanceId(content::WebContents* contents);
 
   static const char Type[];
 
-  // Return the stored rules registry ID of the given webview. Will generate
+  // Returns the stored rules registry ID of the given webview. Will generate
   // an ID for the first query.
   static int GetOrGenerateRulesRegistryID(
       int embedder_process_id,
       int web_view_instance_id);
 
+  // Returns the stored instance ID of the given guest. The instance ID is
+  // unique per <webview> guest, and is used in script injection.
+  // Will generate an ID for the first query.
+  static int GetOrGenerateUniqueInstanceID(
+      int embedder_process_id,
+      int guest_instance_id);
+
   // Request navigating the guest to the provided |src| URL.
   void NavigateGuest(const std::string& src, bool force_navigation);
 
   // Shows the context menu for the guest.
   // |items| acts as a filter. This restricts the current context's default
   // menu items to contain only the items from |items|.
   // |items| == NULL means no filtering will be applied.
   void ShowContextMenu(
       int request_id,
       const WebViewGuestDelegate::MenuItemVector* items);
@@ skipping 290 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<WebViewGuest> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_WEB_VIEW_WEB_VIEW_GUEST_H_