[PPAPI] Fix a bunch of spelling mistakes

ppapi/api/dev/ppb_zoom_dev.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.
  */
 
 /**
  * Implementation of the Zoom interface.
  */
 
 label Chrome {
   M14 = 0.2
 };
 
 /**
  * Zoom interface should only apply to those full-page "plugin-document".
  */
 interface PPB_Zoom_Dev {
   /**
    * Informs the browser about the new zoom factor for the plugin (see
    * ppp_zoom_dev.h for a description of zoom factor). The plugin should only
    * call this function if the zoom change was triggered by the browser, it's
    * only needed in case a plugin can update its own zoom, say because of its
    * own UI.
    */
   void ZoomChanged([in] PP_Instance instance,
                    [in] double_t factor);
   /**
-   * Sets the mininum and maximium zoom factors.
+   * Sets the minimum and maximum zoom factors.
    */
   void ZoomLimitsChanged([in] PP_Instance instance,
                          [in] double_t minimum_factor,
                          [in] double_t maximium_factor);
 };