[PPAPI] Fix a bunch of spelling mistakes

BUG=none

Review URL: https://codereview.chromium.org/13220002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@191456 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ppapi/cpp/file_io.h b/ppapi/cpp/file_io.h
index bf2c857..9bbb5f75 100644
--- a/ppapi/cpp/file_io.h
+++ b/ppapi/cpp/file_io.h
@@ -117,7 +117,7 @@
   /// where a copy of your FileIO resource could outlive your class, the
   /// callback will still be pending when your class goes out of scope, creating
   /// the possibility of writing into invalid memory. So it's recommended to
-  /// keep your FileIO resource and any oubput buffers tightly controlled in
+  /// keep your FileIO resource and any output buffers tightly controlled in
   /// the same scope.
   ///
   /// <strong>Caveat:</strong> This Read() is potentially unsafe if you're using
@@ -229,7 +229,7 @@
     PP_CompletionCallback original_callback;
   };
 
-  // Provide backwards-compatability for older Read versions. Converts the
+  // Provide backwards-compatibility for older Read versions. Converts the
   // old-style "char*" output buffer of 1.0 to the new "PP_ArrayOutput"
   // interface in 1.1.
   //