Remove redundant String casts in tests

third_party/WebKit/Source/platform/geometry/IntRectTest.cpp

 // Copyright 2016 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 "platform/geometry/IntRect.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 TEST(IntRectTest, ToString)
 {
     IntRect emptyRect = IntRect();
-    EXPECT_EQ(String("0,0 0x0"), emptyRect.toString());
+    EXPECT_EQ("0,0 0x0", emptyRect.toString());
 
     IntRect rect(1, 2, 3, 4);
-    EXPECT_EQ(String("1,2 3x4"), rect.toString());
+    EXPECT_EQ("1,2 3x4", rect.toString());
 }
 
 } // namespace blink