mojo_shell crashes on Linux

mojo/services/native_viewport/native_viewport_android.h

 // 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.
 
 #ifndef MOJO_SERVICES_NATIVE_VIEWPORT_NATIVE_VIEWPORT_ANDROID_H_
 #define MOJO_SERVICES_NATIVE_VIEWPORT_NATIVE_VIEWPORT_ANDROID_H_
 
 #include "base/memory/weak_ptr.h"
 #include "mojo/services/native_viewport/native_viewport.h"
 #include "ui/gfx/size.h"
@@ skipping 16 matching lines @@
     return weak_factory_.GetWeakPtr();
   }
 
   void OnNativeWindowCreated(ANativeWindow* window);
   void OnNativeWindowDestroyed();
   void OnResized(const gfx::Size& size);
 
  private:
   // Overridden from NativeViewport:
   virtual gfx::Size GetSize() OVERRIDE;
+  virtual void Open() OVERRIDE;
   virtual void Close() OVERRIDE;
 
   void ReleaseWindow();
 
   NativeViewportDelegate* delegate_;
   ANativeWindow* window_;
   gfx::Size size_;
 
   base::WeakPtrFactory<NativeViewportAndroid> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewportAndroid);
 };
 
 
 }  // namespace services
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_NATIVE_VIEWPORT_NATIVE_VIEWPORT_ANDROID_H_