Removing duplicate 'using namespace blink' from Source/core

Source/core/editing/InputMethodControllerTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/editing/InputMethodController.h"
 
 #include "core/dom/Element.h"
 #include "core/dom/Range.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/testing/DummyPageHolder.h"
 #include <gtest/gtest.h>
 
 using namespace blink;
-using namespace blink;
 
 namespace {
 
 class InputMethodControllerTest : public ::testing::Test {
 protected:
     InputMethodController& controller() { return frame().inputMethodController(); }
     HTMLDocument& document() const { return *m_document; }
     LocalFrame& frame() const { return m_dummyPageHolder->frame(); }
     Element* insertHTMLElement(const char* elementCode, const char* elementId);
 
@@ skipping 95 matching lines @@
     RefPtrWillBeRawPtr<Range> range = controller().compositionRange();
     EXPECT_EQ(1, range->startOffset());
     EXPECT_EQ(6, range->endOffset());
 
     PlainTextRange plainTextRange(PlainTextRange::create(*div, *range.get()));
     EXPECT_EQ(0u, plainTextRange.start());
     EXPECT_EQ(5u, plainTextRange.end());
 }
 
 } // namespace