run aura_demo as a mojo app

mojo/services/native_viewport/native_viewport_win.cc

Index: mojo/services/native_viewport/native_viewport_win.cc
diff --git a/mojo/services/native_viewport/native_viewport_win.cc b/mojo/services/native_viewport/native_viewport_win.cc
index 668a6ab696089816d1a1f7e4c462451183743ae2..4dee98124bae5c40aa59dddb96d4bfd6f6ee9920 100644
--- a/mojo/services/native_viewport/native_viewport_win.cc
+++ b/mojo/services/native_viewport/native_viewport_win.cc
@@ -30,7 +30,7 @@ class NativeViewportWin : public gfx::WindowImpl,
   }
 
   virtual void Init() OVERRIDE {
-    gfx::WindowImpl::Init(NULL, gfx::Rect(10, 10, 500, 500));
+    gfx::WindowImpl::Init(NULL, gfx::Rect(10, 10, 800, 600));
     ShowWindow(hwnd(), SW_SHOWNORMAL);
     SetWindowText(hwnd(), L"native_viewport::NativeViewportWin!");
   }