[oilpan] Make the oilpan branch build on Mac.

Source/WebKit/chromium/src/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 52 matching lines @@
 
     RefPtr<Range> range(TextIterator::rangeFromLocationAndLength(frame->selection()->rootEditableElementOrDocumentElement(), location, length));
     if (!range)
         return nil;
 
     NSMutableAttributedString* string = [[NSMutableAttributedString alloc] init];
     NSMutableDictionary* attrs = [NSMutableDictionary dictionary];
 
     unsigned position = 0;
     for (TextIterator it(range.get()); !it.atEnd() && [string length] < length; it.advance()) {
+        HandleScope scope;
         unsigned numCharacters = it.length();
         if (!numCharacters)
             continue;
 
         ExceptionCode exception = 0;
-        Node* container = it.range()->startContainer(exception);
+        Handle<Node> container = it.range()->startContainer(exception);
         RenderObject* renderer = container->renderer();
         ASSERT(renderer);
         if (!renderer)
             continue;
 
         RenderStyle* style = renderer->style();
         NSFont* font = style->font().primaryFont()->getNSFont();
         // If the platform font can't be loaded, it's likely that the site is
         // using a web font. For now, just use the default font instead.
         // TODO(rsesek): Change the font activation flags to allow other processes
@@ skipping 17 matching lines @@
                                            freeWhenDone:NO] autorelease];
         [string replaceCharactersInRange:NSMakeRange(position, 0)
                               withString:substring];
         [string setAttributes:attrs range:NSMakeRange(position, numCharacters)];
         position += numCharacters;
     }
     return [string autorelease];
 }
 
 } // namespace WebKit