Add WebRange test for explicit empty ranges creation.

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

Index: third_party/WebKit/Source/web/tests/WebRangeTest.cpp
diff --git a/third_party/WebKit/Source/core/animation/animatable/AnimatableNeutralTest.cpp b/third_party/WebKit/Source/web/tests/WebRangeTest.cpp
similarity index 84%
copy from third_party/WebKit/Source/core/animation/animatable/AnimatableNeutralTest.cpp
copy to third_party/WebKit/Source/web/tests/WebRangeTest.cpp
index b9f85c3d0d0c01da09afe26409230fdd8ee15d26..9bffda58fe598631eece27e850a74d9c15a6b0cd 100644
--- a/third_party/WebKit/Source/core/animation/animatable/AnimatableNeutralTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebRangeTest.cpp
@@ -1,5 +1,5 @@
 /*
- * 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
@@ -28,14 +28,20 @@
  * 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