Merge 80710 - 2011-03-09 Alexander Pavlov <apavlov@chromium.org> Reviewed by Pavel Feldm...

Source/WebCore/inspector/front-end/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 1946 matching lines @@
         var wordSuffixRange = selectionRange.startContainer.rangeOfWord(selectionRange.startOffset, WebInspector.StylesSidebarPane.StyleValueDelimiters, this.element, "forward");
         if (!wordSuffixRange.toString())
             return;
         selection.removeAllRanges();
         selection.addRange(wordSuffixRange);
     },
 
     _buildPropertyCompletions: function(wordRange, bestMatchOnly, completionsReadyCallback)
     {
         var prefix = wordRange.toString().toLowerCase();
+        if (!prefix && bestMatchOnly)
+            return;
+
         var results;
         if (bestMatchOnly) {
             results = [];
             var firstMatch = this._cssCompletions.firstStartsWith(prefix);
             if (firstMatch)
                 results.push(firstMatch);
             return completionsReadyCallback(results);
         }
 
         results = this._cssCompletions.startsWith(prefix);
         if (results)
             completionsReadyCallback(results);
     }
 }
 
 WebInspector.StylesSidebarPane.CSSPropertyPrompt.prototype.__proto__ = WebInspector.TextPrompt.prototype;