Cleanup namespace usage in Source/web/.

Source/web/tests/WebPageNewSerializerTest.cpp

Index: Source/web/tests/WebPageNewSerializerTest.cpp
diff --git a/Source/web/tests/WebPageNewSerializerTest.cpp b/Source/web/tests/WebPageNewSerializerTest.cpp
index db128c20ed0ee2089f510fd4c6c64713ed296636..80c70c74c051f84023cf0ffda225d2f7221c024d 100644
--- a/Source/web/tests/WebPageNewSerializerTest.cpp
+++ b/Source/web/tests/WebPageNewSerializerTest.cpp
@@ -47,13 +47,12 @@
 #include "web/tests/FrameTestHelpers.h"
 #include <gtest/gtest.h>
 
-using namespace blink;
-using blink::Document;
+namespace {
+
 using blink::FrameTestHelpers::runPendingTasks;
 using blink::URLTestHelpers::toKURL;
 using blink::URLTestHelpers::registerMockedURLLoad;
-
-namespace {
+using namespace blink;
 
 class LineReader {
 public: