Cleanup namespace usage in Source/web/.

Source/web/tests/MHTMLTest.cpp

 /*
  * Copyright (C) 2014 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
 #include "public/platform/Platform.h"
 #include "public/platform/WebString.h"
 #include "public/platform/WebURL.h"
 #include "public/platform/WebURLRequest.h"
 #include "public/platform/WebURLResponse.h"
 #include "public/platform/WebUnitTestSupport.h"
 #include "public/web/WebDocument.h"
 #include "public/web/WebFrame.h"
 #include "public/web/WebView.h"
 #include "web/tests/FrameTestHelpers.h"
-
 #include <gtest/gtest.h>
 
+namespace {
+
+using blink::URLTestHelpers::toKURL;
 using namespace blink;
-using blink::Document;
-using blink::LocalFrame;
-using blink::Page;
-using blink::KURL;
-using blink::URLTestHelpers::toKURL;
-
-namespace {
 
 class MHTMLTest : public testing::Test {
 public:
     MHTMLTest()
     {
     }
 
 protected:
     virtual void SetUp()
     {
@@ skipping 32 matching lines @@
     registerMockedURLLoad(kFileURL, WebString::fromUTF8("simple_test.mht"));
     loadURLInTopFrame(url);
     ASSERT_TRUE(page());
     LocalFrame* frame = toLocalFrame(page()->mainFrame());
     ASSERT_TRUE(frame);
     Document* document = frame->document();
     ASSERT_TRUE(document);
 
     EXPECT_STREQ(kFileURL, frame->domWindow()->location().href().ascii().data());
 
-    blink::SecurityOrigin* origin = document->securityOrigin();
+    SecurityOrigin* origin = document->securityOrigin();
     EXPECT_STRNE("localhost", origin->domain().ascii().data());
 }
 
 }