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

third_party/WebKit/Source/core/html/parser/TextResourceDecoder.cpp

Index: third_party/WebKit/Source/core/html/parser/TextResourceDecoder.cpp
diff --git a/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.cpp b/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.cpp
index 04ec94b583d03317cbc076c1ecfff4252f78d5ee..cb7988314de486ef892a235155d204483e438f03 100644
--- a/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.cpp
+++ b/third_party/WebKit/Source/core/html/parser/TextResourceDecoder.cpp
@@ -31,8 +31,6 @@
 #include "wtf/text/TextCodec.h"
 #include "wtf/text/TextEncodingRegistry.h"
 
-using namespace WTF;
-
 namespace blink {
 
 using namespace HTMLNames;
@@ -485,7 +483,7 @@ String TextResourceDecoder::decode(const char* data, size_t len) {
     m_codec = newTextCodec(m_encoding);
 
   String result = m_codec->decode(
-      dataForDecode, lengthForDecode, DoNotFlush,
+      dataForDecode, lengthForDecode, WTF::DoNotFlush,
       m_contentType == XMLContent && !m_useLenientXMLDecoding, m_sawError);
 
   m_buffer.clear();
@@ -510,7 +508,7 @@ String TextResourceDecoder::flush() {
     m_codec = newTextCodec(m_encoding);
 
   String result = m_codec->decode(
-      m_buffer.data(), m_buffer.size(), FetchEOF,
+      m_buffer.data(), m_buffer.size(), WTF::FetchEOF,
       m_contentType == XMLContent && !m_useLenientXMLDecoding, m_sawError);
   m_buffer.clear();
   m_codec.reset();