[PPAPI] Fix a bunch of spelling mistakes

ppapi/api/ppb_input_event.idl

 /* 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.
  */
 
 /**
  * This file defines the Input Event interfaces.
  */
 
 label Chrome {
@@ skipping 872 matching lines @@
    *
    * @param[in] index The index.
    *
    * @return A <code>PP_TouchPoint</code> representing the touch-point.
    */
   PP_TouchPoint GetTouchByIndex([in] PP_Resource resource,
                                 [in] PP_TouchListType list,
                                 [in] uint32_t index);
 
   /**
-   * Returns the touch-point with the spcified touch-id in the specified list.
+   * Returns the touch-point with the specified touch-id in the specified list.
    *
    * @param[in] resource A <code>PP_Resource</code> corresponding to a touch
    * event.
    *
    * @param[in] list The list.
    *
    * @param[in] touch_id The id of the touch-point.
    *
    * @return A <code>PP_TouchPoint</code> representing the touch-point.
    */
   PP_TouchPoint GetTouchById([in] PP_Resource resource,
                              [in] PP_TouchListType list,
                              [in] uint32_t touch_id);
 };