Use an empty origin as source origin when posting messages from android_webview

android_webview/native/aw_contents.cc

 // Copyright 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.
 
 #include "android_webview/native/aw_contents.h"
 
 #include <limits>
 
 #include "android_webview/browser/aw_browser_context.h"
 #include "android_webview/browser/aw_browser_main_parts.h"
@@ skipping 1075 matching lines @@
                             jobject obj,
                             jint level,
                             jboolean visible) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   browser_view_renderer_.TrimMemory(level, visible);
 }
 
 // TODO(sgurun) add support for posting a frame whose name is known (only
 //               main frame is supported at this time, see crbug.com/389721)
 void AwContents::PostMessageToFrame(JNIEnv* env, jobject obj,
-    jstring frame_name, jstring message, jstring source_origin,
-    jstring target_origin, jintArray sent_ports) {
+    jstring frame_name, jstring message, jstring target_origin,
+    jintArray sent_ports) {
 
-  base::string16 j_source_origin(ConvertJavaStringToUTF16(env, source_origin));
+  // Use an empty source origin for android webview.
+  base::string16 source_origin;
   base::string16 j_target_origin(ConvertJavaStringToUTF16(env, target_origin));
   base::string16 j_message(ConvertJavaStringToUTF16(env, message));
   std::vector<int> j_ports;
 
   if (sent_ports != nullptr) {
     base::android::JavaIntArrayToIntVector(env, sent_ports, &j_ports);
     BrowserThread::PostTask(
         BrowserThread::IO,
         FROM_HERE,
         base::Bind(&AwMessagePortServiceImpl::RemoveSentPorts,
                    base::Unretained(AwMessagePortServiceImpl::GetInstance()),
                    j_ports));
   }
   content::MessagePortProvider::PostMessageToFrame(web_contents_.get(),
-                                                   j_source_origin,
+                                                   source_origin,
                                                    j_target_origin,
                                                    j_message,
                                                    j_ports);
 }
 
 scoped_refptr<AwMessagePortMessageFilter>
 AwContents::GetMessagePortMessageFilter() {
   // Create a message port message filter if necessary
   if (message_port_message_filter_.get() == nullptr) {
     message_port_message_filter_ =
@@ skipping 10 matching lines @@
 
   AwMessagePortServiceImpl::GetInstance()->CreateMessageChannel(env, ports,
       GetMessagePortMessageFilter());
 }
 
 void SetShouldDownloadFavicons(JNIEnv* env, jclass jclazz) {
   g_should_download_favicons = true;
 }
 
 }  // namespace android_webview