gfx::Screen: Replace GetWindowUnderCursor() with IsWindowUnderCursor().

chromecast/graphics/cast_screen.cc

 // Copyright 2015 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 "chromecast/graphics/cast_screen.h"
 
 #include <stdint.h>
 
 #include "ui/aura/env.h"
 #include "ui/display/screen.h"
@@ skipping 30 matching lines @@
 void CastScreen::UpdateDisplaySize(const gfx::Size& size) {
   display_.SetScaleAndBounds(1.0f, gfx::Rect(size));
   if (!display_resize_cb_.is_null())
     display_resize_cb_.Run(Size(size.width(), size.height()));
 }
 
 gfx::Point CastScreen::GetCursorScreenPoint() {
   return aura::Env::GetInstance()->last_mouse_location();
 }
 
-gfx::NativeWindow CastScreen::GetWindowUnderCursor() {
+bool CastScreen::IsWindowUnderCursor(gfx::NativeWindow window) {
   NOTIMPLEMENTED();
-  return gfx::NativeWindow(nullptr);
+  return false;
 }
 
 gfx::NativeWindow CastScreen::GetWindowAtScreenPoint(const gfx::Point& point) {
   return gfx::NativeWindow(nullptr);
 }
 
 int CastScreen::GetNumDisplays() const {
   return 1;
 }
 
@@ skipping 23 matching lines @@
 void CastScreen::AddObserver(display::DisplayObserver* observer) {}
 
 void CastScreen::RemoveObserver(display::DisplayObserver* observer) {}
 
 CastScreen::CastScreen() : display_(kDisplayId) {
   display_.SetScaleAndBounds(1.0f,
                              gfx::Rect(kInitDisplayWidth, kInitDisplayHeight));
 }
 
 }  // namespace chromecast