Revert cursor changes to RenderWidgetHostViewAura.

content/browser/renderer_host/render_widget_host_view_aura.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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include <set>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 2286 matching lines @@
 
   aura::Window* root_window = window_->GetRootWindow();
   if (!root_window)
     return;
 
   display::Screen* screen = display::Screen::GetScreen();
   DCHECK(screen);
 
   gfx::Point cursor_screen_point = screen->GetCursorScreenPoint();
 
-#if defined(OS_WIN)
+#if !defined(OS_CHROMEOS)
   // Ignore cursor update messages if the window under the cursor is not us.
   aura::Window* window_at_screen_point = screen->GetWindowAtScreenPoint(
       cursor_screen_point);
-
+#if defined(OS_WIN)
   // On Windows we may fail to retrieve the aura Window at the current cursor
   // position. This is because the WindowFromPoint API may return the legacy
   // window which is not associated with an aura Window. In this case we need
   // to get the aura window for the parent of the legacy window.
   if (!window_at_screen_point && legacy_render_widget_host_HWND_) {
     HWND hwnd_at_point = ::WindowFromPoint(cursor_screen_point.ToPOINT());
 
     if (hwnd_at_point == legacy_render_widget_host_HWND_->hwnd())
       hwnd_at_point = legacy_render_widget_host_HWND_->GetParent();
 
     display::win::ScreenWin* screen_win =
         static_cast<display::win::ScreenWin*>(screen);
     window_at_screen_point = screen_win->GetNativeWindowFromHWND(
         hwnd_at_point);
   }
-
+#endif  // defined(OS_WIN)
   if (!window_at_screen_point ||
       (window_at_screen_point->GetRootWindow() != root_window)) {
     return;
   }
-#elif !defined(OS_CHROMEOS)
-  if (!screen->IsWindowUnderCursor(window_))
-    return;
-#endif
+#endif  // !defined(OS_CHROMEOS)
 
   gfx::Point root_window_point = cursor_screen_point;
   aura::client::ScreenPositionClient* screen_position_client =
       aura::client::GetScreenPositionClient(root_window);
   if (screen_position_client) {
     screen_position_client->ConvertPointFromScreen(
         root_window, &root_window_point);
   }
 
   if (root_window->GetEventHandlerForPoint(root_window_point) != window_)
@@ skipping 521 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content