[PPAPI] Fix a bunch of spelling mistakes

ppapi/c/ppb_url_loader.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.
  */
 
-/* From ppb_url_loader.idl modified Wed Oct  5 14:06:02 2011. */
+/* From ppb_url_loader.idl modified Thu Mar 28 10:07:37 2013. */
 
 #ifndef PPAPI_C_PPB_URL_LOADER_H_
 #define PPAPI_C_PPB_URL_LOADER_H_
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_macros.h"
 #include "ppapi/c/pp_resource.h"
 #include "ppapi/c/pp_stdint.h"
@@ skipping 60 matching lines @@
    * Open() begins loading the <code>URLRequestInfo</code>. The operation
    * completes when response headers are received or when an error occurs.  Use
    * GetResponseInfo() to access the response headers.
    *
    * @param[in] loader A <code>PP_Resource</code> corresponding to a
    * <code>URLLoader</code>.
    * @param[in] resource A <code>PP_Resource</code> corresponding to a
    * <code>URLRequestInfo</code>.
    * @param[in] callback A <code>PP_CompletionCallback</code> to run on
    * asynchronous completion of Open(). This callback will run when response
-   * headers for the url are received or error occured. This callback
+   * headers for the url are received or error occurred. This callback
    * will only run if Open() returns <code>PP_OK_COMPLETIONPENDING</code>.
    *
    * @return An int32_t containing an error code from <code>pp_errors.h</code>.
    */
   int32_t (*Open)(PP_Resource loader,
                   PP_Resource request_info,
                   struct PP_CompletionCallback callback);
   /**
    * FollowRedirect() can be invoked to follow a redirect after Open()
    * completed on receiving redirect headers.
@@ skipping 119 matching lines @@
   void (*Close)(PP_Resource loader);
 };
 
 typedef struct PPB_URLLoader_1_0 PPB_URLLoader;
 /**
  * @}
  */
 
 #endif  /* PPAPI_C_PPB_URL_LOADER_H_ */