Skip a few "using namespace" that we don't really need.

third_party/WebKit/Source/core/html/forms/TypeAhead.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights
  * reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
@@ skipping 14 matching lines @@
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #include "core/html/forms/TypeAhead.h"
 
 #include "core/events/KeyboardEvent.h"
 #include "wtf/text/CharacterNames.h"
 
-using namespace WTF::Unicode;
-
 namespace blink {
 
 TypeAhead::TypeAhead(TypeAheadDataSource* dataSource)
     : m_dataSource(dataSource), m_repeatingChar(0) {}
 
 static const TimeDelta typeAheadTimeout = TimeDelta::FromSecondsD(1);
 
 static String stripLeadingWhiteSpace(const String& string) {
   unsigned length = string.length();
 
@@ skipping 74 matching lines @@
   TimeDelta delta = event->platformTimeStamp() - m_lastTypeTime;
   return delta <= typeAheadTimeout;
 }
 
 void TypeAhead::resetSession() {
   m_lastTypeTime = TimeTicks();
   m_buffer.clear();
 }
 
 }  // namespace blink