Don't crash when granting permissions to active tab.

extensions/common/extension_messages.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.
 
 // IPC messages for extensions.
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 #include <vector>
 
@@ skipping 423 matching lines @@
                     int /* id of browser window */)
 
 // Tell the render view what its tab ID is.
 IPC_MESSAGE_ROUTED1(ExtensionMsg_SetTabId,
                     int /* id of tab */)
 
 // Tell the renderer to update an extension's permission set.
 IPC_MESSAGE_CONTROL1(ExtensionMsg_UpdatePermissions,
                      ExtensionMsg_UpdatePermissions_Params)
 
-// Tell the renderer about new tab-specific permissions for an extension.
-IPC_MESSAGE_CONTROL4(ExtensionMsg_UpdateTabSpecificPermissions,
-                     GURL /* url */,
-                     int /* tab_id */,
-                     std::string /* extension_id */,
-                     extensions::URLPatternSet /* hosts */)
+// Tell the render view about new tab-specific permissions for an extension.
+IPC_MESSAGE_ROUTED3(ExtensionMsg_UpdateTabSpecificPermissions,
+                    GURL /* url */,
+                    std::string /* extension_id */,
+                    extensions::URLPatternSet /* hosts */)
 
-// Tell the renderer to clear tab-specific permissions for some extensions.
-IPC_MESSAGE_CONTROL2(ExtensionMsg_ClearTabSpecificPermissions,
-                     int /* tab_id */,
-                     std::vector<std::string> /* extension_ids */)
+// Tell the render view to clear tab-specific permissions for some extensions.
+IPC_MESSAGE_ROUTED1(ExtensionMsg_ClearTabSpecificPermissions,
+                    std::vector<std::string> /* extension_ids */)
 
 // Tell the renderer which type this view is.
 IPC_MESSAGE_ROUTED1(ExtensionMsg_NotifyRenderViewType,
                     extensions::ViewType /* view_type */)
 
 // Deliver a message sent with ExtensionHostMsg_PostMessage.
 IPC_MESSAGE_CONTROL1(ExtensionMsg_UsingWebRequestAPI,
                      bool /* webrequest_used */)
 
 // Ask the lazy background page if it is ready to be suspended. This is sent
@@ skipping 309 matching lines @@
                     int /* acc_obj_id */,
                     base::string16 /* selector */)
 
 // Result of a query selector request.
 // result_acc_obj_id is the accessibility tree ID of the result element; 0
 // indicates no result.
 IPC_MESSAGE_ROUTED3(ExtensionHostMsg_AutomationQuerySelector_Result,
                     int /* request_id */,
                     ExtensionHostMsg_AutomationQuerySelector_Error /* error */,
                     int /* result_acc_obj_id */)