Ignore update cursor messages from blink when the cursor position lies outside our root window

ui/gfx/screen_win.cc

 // Copyright (c) 2012 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 "ui/gfx/screen_win.h"
 
 #include <windows.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 76 matching lines @@
 namespace gfx {
 
 ScreenWin::ScreenWin()
     : singleton_hwnd_observer_(new SingletonHwndObserver(
           base::Bind(&ScreenWin::OnWndProc, base::Unretained(this)))),
       displays_(GetDisplays()) {
 }
 
 ScreenWin::~ScreenWin() {}
 
+HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
+  NOTREACHED();
+  return NULL;
+}
+
+NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
+  NOTREACHED();
+  return NULL;
+}
+
 gfx::Point ScreenWin::GetCursorScreenPoint() {
   POINT pt;
   GetCursorPos(&pt);
   gfx::Point cursor_pos_pixels(pt);
   return gfx::win::ScreenToDIPPoint(cursor_pos_pixels);
 }
 
 gfx::NativeWindow ScreenWin::GetWindowUnderCursor() {
   POINT cursor_loc;
   HWND hwnd = GetCursorPos(&cursor_loc) ? WindowFromPoint(cursor_loc) : NULL;
@@ skipping 76 matching lines @@
                           LPARAM lparam) {
   if (message != WM_DISPLAYCHANGE)
     return;
 
   std::vector<gfx::Display> old_displays = displays_;
   displays_ = GetDisplays();
 
   change_notifier_.NotifyDisplaysChanged(old_displays, displays_);
 }
 
-HWND ScreenWin::GetHWNDFromNativeView(NativeView window) const {
-  NOTREACHED();
-  return NULL;
-}
-
-NativeWindow ScreenWin::GetNativeWindowFromHWND(HWND hwnd) const {
-  NOTREACHED();
-  return NULL;
-}
-
 }  // namespace gfx