Generate CSSPropertyEquality instead of using hand-updated file.

third_party/WebKit/Source/core/testing/Internals.cpp

Index: third_party/WebKit/Source/core/testing/Internals.cpp
diff --git a/third_party/WebKit/Source/core/testing/Internals.cpp b/third_party/WebKit/Source/core/testing/Internals.cpp
index be3ddf545b90cda7010d4ef6ec899ebe6f5cbc85..3eb9aaf6a2ecee92663abbb6b4d0018b4890edff 100644
--- a/third_party/WebKit/Source/core/testing/Internals.cpp
+++ b/third_party/WebKit/Source/core/testing/Internals.cpp
@@ -38,6 +38,7 @@
 #include "core/HTMLNames.h"
 #include "core/SVGNames.h"
 #include "core/animation/AnimationTimeline.h"
+#include "core/css/CSSPropertyEquality.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/css/resolver/StyleResolverStats.h"
@@ -2594,4 +2595,15 @@ String Internals::getProgrammaticScrollAnimationState(Node* node) const
     return String();
 }
 
+bool Internals::isCSSPropertyEqual(String property, Element* a, Element* b, ExceptionState& exceptionState) const
+{
+    CSSPropertyID id = cssPropertyID(property);
+    if (id == CSSPropertyInvalid) {
+        exceptionState.throwDOMException(InvalidAccessError, "Invalid property.");
+        return false;
+    }
+
+    return CSSPropertyEquality::propertiesEqual(id, *a->ensureComputedStyle(), *b->ensureComputedStyle());
+}
+
 } // namespace blink