ALL-IN-ONE: Optimization to previousBoundary() and nextBoundary()

third_party/WebKit/Source/web/mac/WebSubstringUtil.mm

 /*
  * Copyright (C) 2005, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. 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 78 matching lines @@
 
         if (style->visitedDependentColor(CSSPropertyColor).alpha())
             [attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyColor)) forKey:NSForegroundColorAttributeName];
         else
             [attrs removeObjectForKey:NSForegroundColorAttributeName];
         if (style->visitedDependentColor(CSSPropertyBackgroundColor).alpha())
             [attrs setObject:nsColor(style->visitedDependentColor(CSSPropertyBackgroundColor)) forKey:NSBackgroundColorAttributeName];
         else
             [attrs removeObjectForKey:NSBackgroundColorAttributeName];
 
-        Vector<UChar> characters;
+        ForwardsTextBuffer characters;
         it.copyTextTo(characters);
         NSString* substring =
             [[[NSString alloc] initWithCharacters:characters.data()
                                            length:characters.size()] autorelease];
         [string replaceCharactersInRange:NSMakeRange(position, 0)
                               withString:substring];
         [string setAttributes:attrs range:NSMakeRange(position, numCharacters)];
         position += numCharacters;
     }
     return [string autorelease];
@@ skipping 57 matching lines @@
     if (ephemeralRange.isNull())
         return nil;
 
     NSAttributedString* result = attributedSubstringFromRange(ephemeralRange);
     if (baselinePoint)
         *baselinePoint = getBaselinePoint(frame->view(), ephemeralRange, result);
     return result;
 }
 
 } // namespace blink