[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/libraries/ppapi_main/ppapi_queue.h

Index: native_client_sdk/src/libraries/ppapi_main/ppapi_queue.h
diff --git a/native_client_sdk/src/libraries/ppapi_main/ppapi_queue.h b/native_client_sdk/src/libraries/ppapi_main/ppapi_queue.h
index b40c3ec000317c2de8e9d1ef76ada25e9498fb0e..f022dcf0b3c26c9c9c973861fc735f23746ca72a 100644
--- a/native_client_sdk/src/libraries/ppapi_main/ppapi_queue.h
+++ b/native_client_sdk/src/libraries/ppapi_main/ppapi_queue.h
@@ -61,7 +61,7 @@ class PPAPIQueue {
   // 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
@@ -81,4 +81,4 @@ class PPAPIQueue {
 };
 
 
-#endif  // PPAPI_MAIN_PPAPI_QUEUE_H
+#endif  // PPAPI_MAIN_PPAPI_QUEUE_H