Mojo: more idiomatic C++ bindings

mojo/examples/sample_app/sample_app.cc

Index: mojo/examples/sample_app/sample_app.cc
diff --git a/mojo/examples/sample_app/sample_app.cc b/mojo/examples/sample_app/sample_app.cc
index 27e8796e7d2ba0f1c78c6071c23d5ac6149951e8..d8c1199beeb9fb328419334175d03fffe021cbef 100644
--- a/mojo/examples/sample_app/sample_app.cc
+++ b/mojo/examples/sample_app/sample_app.cc
@@ -6,7 +6,6 @@
 #include <string>
 
 #include "mojo/examples/sample_app/gles2_client_impl.h"
-#include "mojo/public/cpp/bindings/allocation_scope.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/gles2/gles2.h"
 #include "mojo/public/cpp/shell/application.h"
@@ -35,18 +34,14 @@ class SampleApp : public Application, public NativeViewportClient {
     ConnectTo("mojo:mojo_native_viewport_service", &viewport_);
     viewport_->SetClient(this);
 
-    AllocationScope scope;
-
-    Rect::Builder rect;
-    Point::Builder point;
-    point.set_x(10);
-    point.set_y(10);
-    rect.set_position(point.Finish());
-    Size::Builder size;
-    size.set_width(800);
-    size.set_height(600);
-    rect.set_size(size.Finish());
-    viewport_->Create(rect.Finish());
+    RectPtr rect(Rect::New());
+    rect->position = Point::New();
+    rect->position->x = 10;
+    rect->position->y = 10;
+    rect->size = Size::New();
+    rect->size->width = 800;
+    rect->size->height = 600;
+    viewport_->Create(rect.Pass());
     viewport_->Show();
 
     MessagePipe gles2_pipe;
@@ -66,14 +61,17 @@ class SampleApp : public Application, public NativeViewportClient {
     RunLoop::current()->Quit();
   }
 
-  virtual void OnBoundsChanged(const Rect& bounds) MOJO_OVERRIDE {
-    gles2_client_->SetSize(bounds.size());
+  virtual void OnBoundsChanged(RectPtr bounds) MOJO_OVERRIDE {
+    assert(bounds);
+    assert(bounds->size);
+    gles2_client_->SetSize(*bounds->size);
   }
 
-  virtual void OnEvent(const Event& event,
+  virtual void OnEvent(EventPtr event,
                        const Callback<void()>& callback) MOJO_OVERRIDE {
-    if (!event.location().is_null())
-      gles2_client_->HandleInputEvent(event);
+    assert(event);
+    if (event->location)
+      gles2_client_->HandleInputEvent(*event);
     callback.Run();
   }