Changed the extension.connect() API not to broadcast to all tabs. Added a

chrome/common/render_messages_internal.h

 // Copyright (c) 2009 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.
 
 // This header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <string>
 #include <vector>
@@ skipping 534 matching lines @@
   // started.
   IPC_MESSAGE_ROUTED0(ViewMsg_MoveOrResizeStarted)
 
   // The browser sends this message in response to all extension api calls.
   IPC_MESSAGE_ROUTED4(ViewMsg_ExtensionResponse,
                       int /* request_id */,
                       bool /* success */,
                       std::string /* response */,
                       std::string /* error */)
 
-  // Call a javascript function in every registered context in this process.
+  // This message is optionally routed.  If used as a control message, it
+  // will call a javascript function in every registered context in the
+  // target process.  If routed, it will be restricted to the contexts that
+  // are part of the target RenderView.
   // |args| is a list of primitive Value types that are passed to the function.
-  IPC_MESSAGE_CONTROL2(ViewMsg_ExtensionMessageInvoke,
-                       std::string /* function_name */,
-                       ListValue /* args */)
+  IPC_MESSAGE_ROUTED2(ViewMsg_ExtensionMessageInvoke,
+                      std::string /* function_name */,
+                      ListValue /* args */)
 
   // Tell the renderer process all known extension function names.
   IPC_MESSAGE_CONTROL1(ViewMsg_Extension_SetFunctionNames,
                        std::vector<std::string>)
 
   // Tell the renderer process all known page action ids for a particular
   // extension.
   IPC_MESSAGE_CONTROL2(ViewMsg_Extension_UpdatePageActions,
                        std::string /* extension_id */,
                        std::vector<std::string> /* page_action_ids */)
@@ skipping 851 matching lines @@
   // Open a channel to all listening contexts owned by the extension with
   // the given ID.  This always returns a valid port ID which can be used for
   // sending messages.  If an error occurred, the opener will be notified
   // asynchronously.
   IPC_SYNC_MESSAGE_CONTROL3_1(ViewHostMsg_OpenChannelToExtension,
                               int /* routing_id */,
                               std::string /* extension_id */,
                               std::string /* channel_name */,
                               int /* port_id */)
 
-  // Get a port handle to the given tab's process.  The handle can be used for
-  // sending messages to the extension.
-  IPC_SYNC_MESSAGE_CONTROL2_1(ViewHostMsg_OpenChannelToTab,
+  // Get a port handle to the given tab.  The handle can be used for sending
+  // messages to the extension.
+  IPC_SYNC_MESSAGE_CONTROL4_1(ViewHostMsg_OpenChannelToTab,
                               int /* routing_id */,
                               int /* tab_id */,
+                              std::string /* extension_id */,
+                              std::string /* channel_name */,
                               int /* port_id */)
 
   // Send a message to an extension process.  The handle is the value returned
   // by ViewHostMsg_OpenChannelTo*.
   IPC_MESSAGE_ROUTED2(ViewHostMsg_ExtensionPostMessage,
                       int /* port_id */,
                       std::string /* message */)
 
   // Send a message to an extension process.  The handle is the value returned
   // by ViewHostMsg_OpenChannelTo*.
@@ skipping 47 matching lines @@
   // web resource.  |error_message| is a user-readable explanation of what
   // went wrong.
   IPC_MESSAGE_CONTROL1(UtilityHostMsg_UnpackWebResource_Failed,
                        std::string /* error_message, if any */)
 
   // Sent by the renderer process to acknowledge receipt of a
   // ViewMsg_CSSInsertRequest message and css has been inserted into the frame.
   IPC_MESSAGE_ROUTED0(ViewHostMsg_OnCSSInserted)
 
 IPC_END_MESSAGES(ViewHost)