third_party/WebKit: fix typos found in comments

third_party/WebKit/Source/platform/fonts/shaping/HarfBuzzShaper.cpp

 /*
  * Copyright (c) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 BlackBerry Limited. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 384 matching lines @@
                     // characters have been shaped, too.
                     currentClusterResult = currentClusterResult == Shaped ? Shaped : NotDef;
                 }
                 continue;
             }
             // We've moved to a new cluster.
             previousClusterResult = currentClusterResult;
             currentClusterResult = glyphInfo[glyphIndex].codepoint == 0 ? NotDef : Shaped;
         } else {
             // The code below operates on the "flanks"/changes between NotDef
-            // and Shaped. In order to keep the code below from explictly
+            // and Shaped. In order to keep the code below from explicitly
             // dealing with character indices and run end, we explicitly
             // terminate the cluster/run here by setting the result value to the
             // opposite of what it was, leading to atChange turning true.
             previousClusterResult = currentClusterResult;
             currentClusterResult = currentClusterResult == NotDef ? Shaped : NotDef;
         }
 
         bool atChange = (previousClusterResult != currentClusterResult) && previousClusterResult != Unknown;
         if (!atChange)
             continue;
@@ skipping 383 matching lines @@
     }
 
     // Don't need to check m_textRun.allowsTrailingExpansion() since it's covered by !m_expansionOpportunityCount above
     spacing += nextExpansionPerOpportunity();
     m_isAfterExpansion = true;
     return spacing;
 }
 
 
 } // namespace blink