Added check to prevent extensions from injecting scrips into other extensions

chrome/common/extensions/extension.h

 // Copyright (c) 2012 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 CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 #define CHROME_COMMON_EXTENSIONS_EXTENSION_H_
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
@@ skipping 513 matching lines @@
   SkBitmap GetCachedImage(const ExtensionResource& source,
                           const gfx::Size& max_size) const;
 
   // Returns true if this extension can execute script on a page. If a
   // UserScript object is passed, permission to run that specific script is
   // checked (using its matches list). Otherwise, permission to execute script
   // programmatically is checked (using the extension's host permission).
   //
   // This method is also aware of certain special pages that extensions are
   // usually not allowed to run script on.
-  bool CanExecuteScriptOnPage(const GURL& page_url,
+  bool CanExecuteScriptOnPage(const GURL& document_url,
+                              const GURL& top_document_url,
                               int tab_id,
                               const UserScript* script,
                               std::string* error) const;
 
   // Returns true if this extension is a COMPONENT extension, or if it is
   // on the whitelist of extensions that can script all pages.
   bool CanExecuteScriptEverywhere() const;
 
   // Returns true if this extension is allowed to obtain the contents of a
   // page as an image.  Since a page may contain sensitive information, this
@@ skipping 650 matching lines @@
 
   UpdatedExtensionPermissionsInfo(
       const Extension* extension,
       const PermissionSet* permissions,
       Reason reason);
 };
 
 } // namespace extensions
 
 #endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_H_