Fixes cursor hiding bug

ui/views/widget/desktop_aura/desktop_root_window_host_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/views/widget/desktop_aura/desktop_root_window_host_win.h"
 
 #include "base/win/metro.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/client/aura_constants.h"
@@ skipping 46 matching lines @@
     : root_window_(NULL),
       message_handler_(new HWNDMessageHandler(this)),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura),
       root_window_host_delegate_(NULL),
       content_window_(NULL),
       drag_drop_client_(NULL),
       should_animate_window_close_(false),
       pending_close_(false),
       has_non_client_view_(false),
-      tooltip_(NULL) {
+      tooltip_(NULL),
+      is_cursor_visible_(true) {
 }
 
 DesktopRootWindowHostWin::~DesktopRootWindowHostWin() {
   // WARNING: |content_window_| has been destroyed by the time we get here.
   desktop_native_widget_aura_->OnDesktopRootWindowHostDestroyed(
       root_window_);
 }
 
 // static
 aura::Window* DesktopRootWindowHostWin::GetContentWindowForHWND(HWND hwnd) {
@@ skipping 403 matching lines @@
   RECT window_rect = root_window_->window()->GetBoundsInScreen().ToRECT();
   ::ClipCursor(&window_rect);
   return true;
 }
 
 void DesktopRootWindowHostWin::UnConfineCursor() {
   ::ClipCursor(NULL);
 }
 
 void DesktopRootWindowHostWin::OnCursorVisibilityChanged(bool show) {
+  if (is_cursor_visible_ == show)
+    return;
+  is_cursor_visible_ = show;
   ::ShowCursor(!!show);
 }
 
 void DesktopRootWindowHostWin::MoveCursorTo(const gfx::Point& location) {
   POINT cursor_location = location.ToPOINT();
   ::ClientToScreen(GetHWND(), &cursor_location);
   ::SetCursorPos(cursor_location.x, cursor_location.y);
 }
 
 void DesktopRootWindowHostWin::SetFocusWhenShown(bool focus_when_shown) {
@@ skipping 412 matching lines @@
 
 // static
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura) {
   return new DesktopRootWindowHostWin(native_widget_delegate,
                                       desktop_native_widget_aura);
 }
 
 }  // namespace views