[PPAPI] Fix a bunch of spelling mistakes

ppapi/api/pp_array_output.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.
  */
 
 /**
  * PP_ArrayOutput_GetDataBuffer is a callback function to allocate plugin
  * memory for an array. It returns the allocated memory or null on failure.
  *
  * This function will be called reentrantly. This means that if you call a
@@ skipping 25 matching lines @@
  * @return Returns a pointer to the allocated memory. On failure, returns null.
  * You can also return null if the element_count is 0.
  */
 typedef mem_t PP_ArrayOutput_GetDataBuffer([inout] mem_t user_data,
                                            [in] uint32_t element_count,
                                            [in] uint32_t element_size);
 
 /**
  * A structure that defines a way for the browser to return arrays of data
  * to the plugin. The browser can not allocate memory on behalf of the plugin
- * becaues the plugin and browser may have different allocators.
+ * because the plugin and browser may have different allocators.
  *
  * Array output works by having the browser call to the plugin to allocate a
  * buffer, and then the browser will copy the contents of the array into that
  * buffer.
  *
  * In C, you would typically implement this as follows:
  *
  * @code
  * struct MyArrayOutput {
  *   void* data;
@@ skipping 24 matching lines @@
    * A pointer to the allocation function that the browser implements.
    */
   PP_ArrayOutput_GetDataBuffer GetDataBuffer;
 
   /**
    * Data that is passed to the allocation function. Typically, this is used
    * to communicate how the data should be stored.
    */
   mem_t user_data;
 };