Extensions: Send the tab id to platform apps.

chrome/renderer/resources/extensions/send_request.js

 // 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.
 
 var lastError = require('lastError');
 var logging = requireNative('logging');
 var natives = requireNative('sendRequest');
 var processNatives = requireNative('process');
 var validate = require('schemaUtils').validate;
 
@@ skipping 105 matching lines @@
 
 // Send an API request and optionally register a callback.
 // |optArgs| is an object with optional parameters as follows:
 // - customCallback: a callback that should be called instead of the standard
 //   callback.
 // - nativeFunction: the v8 native function to handle the request, or
 //   StartRequest if missing.
 // - forIOThread: true if this function should be handled on the browser IO
 //   thread.
 // - preserveNullInObjects: true if it is safe for null to be in objects.
+// - senderTabId: the ID of the tab that triggered this request.
 function sendRequest(functionName, args, argSchemas, optArgs) {
   calledSendRequest = true;
   if (!optArgs)
     optArgs = {};
   var request = prepareRequest(args, argSchemas);
   request.stack = getExtensionStackTrace();
   if (optArgs.customCallback) {
     request.customCallback = optArgs.customCallback;
   }
 
   var nativeFunction = optArgs.nativeFunction || natives.StartRequest;
 
   var requestId = natives.GetNextRequestId();
   request.id = requestId;
   requests[requestId] = request;
 
   var hasCallback = request.callback || optArgs.customCallback;
   return nativeFunction(functionName,
                         request.args,
                         requestId,
                         hasCallback,
                         optArgs.forIOThread,
-                        optArgs.preserveNullInObjects);
+                        optArgs.preserveNullInObjects,
+                        optArgs.senderTabId);
 }
 
 function getCalledSendRequest() {
   return calledSendRequest;
 }
 
 function clearCalledSendRequest() {
   calledSendRequest = false;
 }
 
 exports.sendRequest = sendRequest;
 exports.getCalledSendRequest = getCalledSendRequest;
 exports.clearCalledSendRequest = clearCalledSendRequest;
 
 // Called by C++.
 exports.handleResponse = handleResponse;