Replace WTF::emptyString{16Bit}() with a static global

third_party/WebKit/Source/core/dom/AttrTest.cpp

 // Copyright 2015 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 "core/dom/Attr.h"
 
 #include "core/dom/Document.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 16 matching lines @@
   m_value = "value";
 }
 
 Attr* AttrTest::createAttribute() {
   return m_document->createAttribute("name", ASSERT_NO_EXCEPTION);
 }
 
 TEST_F(AttrTest, InitialValueState) {
   Attr* attr = createAttribute();
   EXPECT_EQ(emptyAtom, attr->value());
-  EXPECT_EQ(emptyString(), attr->toNode()->nodeValue());
-  EXPECT_EQ(emptyString(), attr->textContent());
+  EXPECT_EQ(emptyString, attr->toNode()->nodeValue());
+  EXPECT_EQ(emptyString, attr->textContent());
 }
 
 TEST_F(AttrTest, SetValue) {
   Attr* attr = createAttribute();
   attr->setValue(value());
   EXPECT_EQ(value(), attr->value());
   EXPECT_EQ(value(), attr->toNode()->nodeValue());
   EXPECT_EQ(value(), attr->textContent());
 }
 
@@ skipping 14 matching lines @@
 }
 
 TEST_F(AttrTest, LengthOfContents) {
   Attr* attr = createAttribute();
   EXPECT_EQ(0u, attr->lengthOfContents());
   attr->setValue(value());
   EXPECT_EQ(0u, attr->lengthOfContents());
 }
 
 }  // namespace blink