aura: Remove WindowTreeHost::QueryMouseLocation().

mojo/examples/aura_demo/window_tree_host_mojo.cc

 // Copyright (c) 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 "mojo/examples/aura_demo/window_tree_host_mojo.h"
 
 #include "mojo/examples/aura_demo/demo_context_factory.h"
 #include "mojo/public/c/gles2/gles2.h"
 #include "mojo/public/cpp/bindings/allocation_scope.h"
 #include "mojo/services/native_viewport/geometry_conversions.h"
@@ skipping 78 matching lines @@
 }
 
 void WindowTreeHostMojo::SetCapture() {
   NOTIMPLEMENTED();
 }
 
 void WindowTreeHostMojo::ReleaseCapture() {
   NOTIMPLEMENTED();
 }
 
-bool WindowTreeHostMojo::QueryMouseLocation(gfx::Point* location_return) {
-  NOTIMPLEMENTED() << "QueryMouseLocation";
-  return false;
-}
-
 void WindowTreeHostMojo::PostNativeEvent(
     const base::NativeEvent& native_event) {
   NOTIMPLEMENTED();
 }
 
 void WindowTreeHostMojo::OnDeviceScaleFactorChanged(float device_scale_factor) {
   NOTIMPLEMENTED();
 }
 
 void WindowTreeHostMojo::SetCursorNative(gfx::NativeCursor cursor) {
@@ skipping 58 matching lines @@
       SendEventToProcessor(&ev);
       break;
     }
     // TODO(beng): touch, etc.
   }
   callback.Run();
 };
 
 }  // namespace examples
 }  // namespace mojo