[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/libraries/ppapi_main/ppapi_queue.h

 // Copyright (c) 2013 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 PPAPI_MAIN_PPAPI_QUEUE_H
 #define PPAPI_MAIN_PPAPI_QUEUE_H
 
 #include <stdint.h>
 
@@ skipping 43 matching lines @@
   bool AddNewMessage(void* msg);
   void* RemoveStaleMessage();
 
   //
   // Consumer API
   //
   // The reader will attempt to Acquire the top message, if one is not
   // available NULL will be returned.  Once the consumer is done with the
   // message, ReleaseTopMessage is called to signal that the payload is no
   // longer visible to the consumer and can be recycled or destroyed.
-  // Since messages are freed in order, it is recquired that messages are
+  // Since messages are freed in order, it is required that messages are
   // consumed in order.  For this reason, it is illegal to call Acquire again
   // after a non-NULL message pointer is returned, until Release is called on
   // the old message.  This means the consumer can only look at one message
   // at a time.  To look at multiple messages at once, the consumer would
   // need to make a copy and release the top message.
   //
   void* AcquireTopMessage();
   void ReleaseTopMessage(void* msg);
 
  private:
   uint32_t read_;
   uint32_t write_;
   uint32_t freed_;
   uint32_t size_;
   void*  last_msg_;
   void** array_;
 };
 
 
-#endif  // PPAPI_MAIN_PPAPI_QUEUE_H
+#endif  // PPAPI_MAIN_PPAPI_QUEUE_H