Incorporate ComputedStyle::hasTransform when diffing transform styles.

third_party/WebKit/Source/core/style/ComputedStyleTest.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 "core/style/ComputedStyle.h"
 
 #include "core/style/ClipPathOperation.h"
 #include "core/style/ShapeValue.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 74 matching lines @@
   EXPECT_TRUE(style->hasAnyPublicPseudoStyles());
 }
 
 TEST(ComputedStyleTest, LastPublicPseudoStyle) {
   RefPtr<ComputedStyle> style = ComputedStyle::create();
   style->setHasPseudoStyle(PseudoIdScrollbar);
   EXPECT_TRUE(style->hasPseudoStyle(PseudoIdScrollbar));
   EXPECT_TRUE(style->hasAnyPublicPseudoStyles());
 }
 
+TEST(ComputedStyleTest,
+     UpdatePropertySpecificDifferencesRespectsTransformAnimation) {
+  RefPtr<ComputedStyle> style = ComputedStyle::create();
+  RefPtr<ComputedStyle> other = ComputedStyle::clone(*style);
+  other->setHasCurrentTransformAnimation();
+  StyleDifference diff;
+  style->updatePropertySpecificDifferences(*other, diff);
+  EXPECT_TRUE(diff.transformChanged());
+}
+
 }  // namespace blink