Wires up view manager to an actual display

mojo/services/native_viewport/native_viewport_service.cc

Index: mojo/services/native_viewport/native_viewport_service.cc
diff --git a/mojo/services/native_viewport/native_viewport_service.cc b/mojo/services/native_viewport/native_viewport_service.cc
index 5625aa13935485f8b2a6cbcb47a8dd95c4a53ae5..9585ae7da0fcc8d3ccda4e6b00ca97a9fb25c6b8 100644
--- a/mojo/services/native_viewport/native_viewport_service.cc
+++ b/mojo/services/native_viewport/native_viewport_service.cc
@@ -36,7 +36,11 @@ class NativeViewportImpl
   NativeViewportImpl()
       : widget_(gfx::kNullAcceleratedWidget),
         waiting_for_event_ack_(false) {}
-  virtual ~NativeViewportImpl() {}
+  virtual ~NativeViewportImpl() {
+    // Destroy the NativeViewport early on as it may call us back during
+    // destruction and we want to be in a known state.
+    native_viewport_.reset();
+  }
 
   virtual void Create(const Rect& bounds) OVERRIDE {
     native_viewport_ =