Change AckEvent into request / response

mojo/examples/pepper_container_app/pepper_container_app.cc

 // Copyright 2014 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 "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "build/build_config.h"
 #include "mojo/examples/pepper_container_app/mojo_ppapi_globals.h"
@@ skipping 72 matching lines @@
     base::MessageLoop::current()->Quit();
   }
 
   virtual void OnBoundsChanged(const Rect& bounds) OVERRIDE {
     ppapi::ProxyAutoLock lock;
 
     if (plugin_instance_)
       plugin_instance_->DidChangeView(bounds);
   }
 
-  virtual void OnEvent(const Event& event) OVERRIDE {
-    if (event.location().is_null())
-      return;
-
-    {
+  virtual void OnEvent(const Event& event,
+                       const mojo::Callback<void()>& callback) OVERRIDE {
+    if (!event.location().is_null()) {
       ppapi::ProxyAutoLock lock;
 
       // TODO(yzshen): Handle events.
     }
-    viewport_->AckEvent(event);
+    callback.Run();
   }
 
   // MojoPpapiGlobals::Delegate implementation.
   virtual ScopedMessagePipeHandle CreateGLES2Context() OVERRIDE {
     MessagePipe gles2_pipe;
     viewport_->CreateGLES2Context(gles2_pipe.handle1.Pass());
     return gles2_pipe.handle0.Pass();
   }
 
  private:
@@ skipping 12 matching lines @@
 extern "C" PEPPER_CONTAINER_APP_EXPORT MojoResult CDECL MojoMain(
     MojoHandle shell_handle) {
   mojo::Environment env;
   mojo::GLES2Initializer gles2;
   base::MessageLoop run_loop;
   mojo::examples::PepperContainerApp app(shell_handle);
 
   run_loop.Run();
   return MOJO_RESULT_OK;
 }