Incorporate ComputedStyle::hasTransform when diffing transform styles.

third_party/WebKit/Source/core/style/ComputedStyleTest.cpp

Index: third_party/WebKit/Source/core/style/ComputedStyleTest.cpp
diff --git a/third_party/WebKit/Source/core/style/ComputedStyleTest.cpp b/third_party/WebKit/Source/core/style/ComputedStyleTest.cpp
index 7c8f3c64a124c1d1e9c5d725abdbf2ef97d07eaa..93bdef48fca8dce7dabbd085536e428a612a3a8e 100644
--- a/third_party/WebKit/Source/core/style/ComputedStyleTest.cpp
+++ b/third_party/WebKit/Source/core/style/ComputedStyleTest.cpp
@@ -92,4 +92,14 @@ TEST(ComputedStyleTest, LastPublicPseudoStyle) {
   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