Connects PostMessage() for OOPIFs

mandoline/tab/frame_apptest.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/frame.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 135 matching lines @@
     connect_frames_ = frames.Pass();
     server_ = server.Pass();
   }
   void OnFrameAdded(uint32_t change_id, FrameDataPtr frame) override {
     adds_.push_back(frame.Pass());
   }
   void OnFrameRemoved(uint32_t change_id, uint32_t frame_id) override {}
   void OnFrameClientPropertyChanged(uint32_t frame_id,
                                     const mojo::String& name,
                                     mojo::Array<uint8_t> new_data) override {}
+  void PostMessage(uint32_t source_frame_id,
+                   uint32_t target_frame_id,
+                   HTMLMessageEventPtr event) override {}
 
  private:
   int connect_count_;
   mojo::Array<FrameDataPtr> connect_frames_;
   FrameTreeServerPtr server_;
   mojo::Array<FrameDataPtr> adds_;
 
   DISALLOW_COPY_AND_ASSIGN(TestFrameTreeClient);
 };
 
@@ skipping 34 matching lines @@
   EXPECT_EQ(tree.root()->view()->id(), frames_in_child[0]->frame_id);
   EXPECT_EQ(0u, frames_in_child[0]->parent_id);
   EXPECT_EQ(child_frame->view()->id(), frames_in_child[1]->frame_id);
   EXPECT_EQ(tree.root()->view()->id(), frames_in_child[1]->parent_id);
 
   // We should have gotten notification of the add.
   EXPECT_EQ(1u, root_client.adds().size());
 }
 
 }  // namespace mandoline