Connects PostMessage() for OOPIFs

mandoline/tab/test_frame_tree_delegate.cc

 // Copyright 2015 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 "mandoline/tab/test_frame_tree_delegate.h"
 
 namespace mandoline {
 
 TestFrameTreeDelegate::TestFrameTreeDelegate() {}
 
 TestFrameTreeDelegate::~TestFrameTreeDelegate() {}
 
-bool TestFrameTreeDelegate::CanPostMessageEventToFrame(const Frame* source,
-                                                       const Frame* target,
-                                                       MessageEvent* event) {
-  return false;
+bool TestFrameTreeDelegate::CanPostMessageEventToFrame(
+    const Frame* source,
+    const Frame* target,
+    HTMLMessageEvent* event) {
+  return true;
 }
 
 void TestFrameTreeDelegate::LoadingStateChanged(bool loading) {}
 
 void TestFrameTreeDelegate::ProgressChanged(double progress) {}
 
 void TestFrameTreeDelegate::RequestNavigate(Frame* source,
                                             NavigationTargetType target_type,
                                             Frame* target_frame,
                                             mojo::URLRequestPtr request) {}
 
 }  // namespace mandoline