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

headless/lib/browser/headless_screen.cc

 // Copyright 2016 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 "headless/lib/browser/headless_screen.h"
 
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "ui/aura/env.h"
@@ skipping 104 matching lines @@
 
 void HeadlessScreen::OnWindowDestroying(aura::Window* window) {
   if (host_->window() == window)
     host_ = NULL;
 }
 
 gfx::Point HeadlessScreen::GetCursorScreenPoint() {
   return aura::Env::GetInstance()->last_mouse_location();
 }
 
-gfx::NativeWindow HeadlessScreen::GetWindowUnderCursor() {
-  return GetWindowAtScreenPoint(GetCursorScreenPoint());
+bool HeadlessScreen::IsWindowUnderCursor(gfx::NativeWindow window) {
+  return GetWindowAtScreenPoint(GetCursorScreenPoint()) == window;
 }
 
 gfx::NativeWindow HeadlessScreen::GetWindowAtScreenPoint(
     const gfx::Point& point) {
   if (!host_ || !host_->window())
     return nullptr;
   return host_->window()->GetTopWindowContainingPoint(point);
 }
 
 int HeadlessScreen::GetNumDisplays() const {
@@ skipping 28 matching lines @@
 void HeadlessScreen::RemoveObserver(gfx::DisplayObserver* observer) {}
 
 HeadlessScreen::HeadlessScreen(const gfx::Rect& screen_bounds)
     : host_(NULL), ui_scale_(1.0f) {
   static int64_t synthesized_display_id = 2000;
   display_.set_id(synthesized_display_id++);
   display_.SetScaleAndBounds(1.0f, screen_bounds);
 }
 
 }  // namespace headless