Enable CursorManager::LockCursor to lock cursor visibility.

ui/views/widget/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_root_window_host_win.h"
 
 #include "base/command_line.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/aura/desktop/desktop_activation_client.h"
@@ skipping 333 matching lines @@
 void DesktopRootWindowHostWin::SetCursor(gfx::NativeCursor cursor) {
   // Custom web cursors are handled directly.
   if (cursor == ui::kCursorCustom)
     return;
   ui::CursorLoaderWin cursor_loader;
   cursor_loader.SetPlatformCursor(&cursor);
 
   message_handler_->SetCursor(cursor.platform());
 }
 
-void DesktopRootWindowHostWin::ShowCursor(bool show) {
-}
-
 bool DesktopRootWindowHostWin::QueryMouseLocation(gfx::Point* location_return) {
   return false;
 }
 
 bool DesktopRootWindowHostWin::ConfineCursorToRootWindow() {
   return false;
 }
 
 void DesktopRootWindowHostWin::UnConfineCursor() {
 }
@@ skipping 340 matching lines @@
 DesktopRootWindowHost* DesktopRootWindowHost::Create(
     internal::NativeWidgetDelegate* native_widget_delegate,
     DesktopNativeWidgetAura* desktop_native_widget_aura,
     const gfx::Rect& initial_bounds) {
   return new DesktopRootWindowHostWin(native_widget_delegate,
                                       desktop_native_widget_aura,
                                       initial_bounds);
 }
 
 }  // namespace views