Don't warp mouse if the cursor is locked.

ui/aura/cursor_manager.h

 // 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.
 
 #ifndef UI_AURA_CURSOR_MANAGER_H_
 #define UI_AURA_CURSOR_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "ui/aura/aura_export.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace aura {
 class CursorDelegate;
 
 // This class controls the visibility and the type of the cursor.
 // The cursor type can be locked so that the type stays the same
 // until it's unlocked.
 class AURA_EXPORT CursorManager {
  public:
   CursorManager();
   ~CursorManager();
 
   void set_delegate(CursorDelegate* delegate) { delegate_ = delegate; }
 
   // Locks/Unlocks the cursor change.
   void LockCursor();
   void UnlockCursor();
 
+  bool IsCursorLocked();
+
   void SetCursor(gfx::NativeCursor);
 
   // Shows or hides the cursor.
   void ShowCursor(bool show);
   bool cursor_visible() const { return cursor_visible_; }
 
  private:
   CursorDelegate* delegate_;
 
   // Number of times LockCursor() has been invoked without a corresponding
   // UnlockCursor().
   int cursor_lock_count_;
 
   // Set to true if UpdateCursor() is invoked while |cursor_lock_count_| == 0.
   bool did_cursor_change_;
 
   // Cursor to set once |cursor_lock_count_| is set to 0. Only valid if
   // |did_cursor_change_| is true.
   gfx::NativeCursor cursor_to_set_on_unlock_;
 
   // Is cursor visible?
   bool cursor_visible_;
 
   DISALLOW_COPY_AND_ASSIGN(CursorManager);
 };
 
 }  // namespace aura
 
 #endif  // UI_AURA_CURSOR_MANAGER_H_
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