Remove unused "using" statements in WebKit/Source/platform.

third_party/WebKit/Source/platform/fonts/FontPlatformData.cpp

 /*
  * Copyright (C) 2011 Brent Fulgham
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 17 matching lines @@
 #include "platform/text/Character.h"
 #include "platform/wtf/ByteSwap.h"
 #include "platform/wtf/HashMap.h"
 #include "platform/wtf/text/StringHash.h"
 #include "platform/wtf/text/WTFString.h"
 
 #if OS(MACOSX)
 #include "third_party/skia/include/ports/SkTypeface_mac.h"
 #endif
 
-using namespace std;
-
 namespace blink {
 
 FontPlatformData::FontPlatformData(WTF::HashTableDeletedValueType)
     : typeface_(nullptr),
       text_size_(0),
       synthetic_bold_(false),
       synthetic_italic_(false),
       orientation_(FontOrientation::kHorizontal),
       is_hash_table_deleted_value_(true)
 #if OS(WIN)
@@ skipping 286 matching lines @@
   const size_t table_size = typeface_->getTableSize(tag);
   if (table_size) {
     Vector<char> table_buffer(table_size);
     typeface_->getTableData(tag, 0, table_size, &table_buffer[0]);
     buffer = SharedBuffer::AdoptVector(table_buffer);
   }
   return buffer.Release();
 }
 
 }  // namespace blink