Mojo: more idiomatic C++ bindings

mojo/examples/compositor_app/compositor_app.cc

 // Copyright 2013 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 <stdio.h>
 #include <string>
 
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/examples/compositor_app/compositor_host.h"
 #include "mojo/geometry/geometry_type_converters.h"
-#include "mojo/public/cpp/bindings/allocation_scope.h"
 #include "mojo/public/cpp/gles2/gles2.h"
 #include "mojo/public/cpp/shell/application.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/public/interfaces/shell/shell.mojom.h"
 #include "mojo/services/native_viewport/native_viewport.mojom.h"
 #include "ui/gfx/rect.h"
 
 #if defined(WIN32)
 #if !defined(CDECL)
 #define CDECL __cdecl
 #endif
 #define SAMPLE_APP_EXPORT __declspec(dllexport)
 #else
 #define CDECL
 #define SAMPLE_APP_EXPORT __attribute__((visibility("default")))
 #endif
 
 namespace mojo {
 namespace examples {
 
 class SampleApp : public Application, public NativeViewportClient {
  public:
   explicit SampleApp(MojoHandle shell_handle) : Application(shell_handle) {
-    AllocationScope scope;
-
     ConnectTo("mojo:mojo_native_viewport_service", &viewport_);
     viewport_.set_client(this);
 
-    viewport_->Create(gfx::Rect(10, 10, 800, 600));
+    viewport_->Create(Rect::From(gfx::Rect(10, 10, 800, 600)));
     viewport_->Show();
 
     MessagePipe gles2_pipe;
     viewport_->CreateGLES2Context(gles2_pipe.handle0.Pass());
     host_.reset(new CompositorHost(gles2_pipe.handle1.Pass()));
   }
 
   virtual void OnCreated() OVERRIDE {
   }
 
   virtual void OnDestroyed() OVERRIDE {
     base::MessageLoop::current()->Quit();
   }
 
-  virtual void OnBoundsChanged(const Rect& bounds) OVERRIDE {
-    host_->SetSize(bounds.size());
+  virtual void OnBoundsChanged(RectPtr bounds) OVERRIDE {
+    host_->SetSize(bounds->size.To<gfx::Size>());
   }
 
-  virtual void OnEvent(const Event& event,
+  virtual void OnEvent(EventPtr event,
                        const mojo::Callback<void()>& callback) OVERRIDE {
     callback.Run();
   }
 
  private:
   NativeViewportPtr viewport_;
   scoped_ptr<CompositorHost> host_;
 };
 
 }  // namespace examples
 }  // namespace mojo
 
 extern "C" SAMPLE_APP_EXPORT MojoResult CDECL MojoMain(
     MojoHandle shell_handle) {
   base::MessageLoop loop;
   mojo::GLES2Initializer gles2;
 
   mojo::examples::SampleApp app(shell_handle);
   loop.Run();
   return MOJO_RESULT_OK;
 }