Add WebRange test for explicit empty ranges creation.

third_party/WebKit/Source/web/tests/WebRangeTest.cpp

 /*
- * Copyright (c) 2013, Google Inc. All rights reserved.
+ * Copyright (C) 2017 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
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#include "core/animation/animatable/AnimatableNeutral.h"
+#include "public/web/WebRange.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
-TEST(AnimationAnimatableNeutralTest, Create) {
-  EXPECT_TRUE(AnimatableValue::neutralValue());
+TEST(WebRangeTest, Empty) {
+  WebRange empty1(0, 0);
+  EXPECT_FALSE(empty1.isNull());
+  EXPECT_TRUE(empty1.isEmpty());
+
+  WebRange empty2(57, 0);
+  EXPECT_FALSE(empty2.isNull());
+  EXPECT_TRUE(empty2.isEmpty());
 }
 
 }  // namespace blink