Generate CSSPropertyEquality instead of using hand-updated file.

third_party/WebKit/Source/build/scripts/templates/CSSPropertyEquality.cpp.tmpl

+// Copyright 2016 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/css/CSSPropertyEquality.h"
+
+#include "core/CSSPropertyEqualityCustom.h"
+#include "core/css/CSSProperty.h"
+#include "core/style/ComputedStyle.h"
+#include "core/style/DataEquivalency.h"
+
+namespace blink {
+
+bool CSSPropertyEquality::propertiesEqual(CSSPropertyID id, const ComputedStyle& a, const ComputedStyle& b)
+{
+    switch (id) {
+    {% for property_id, property in properties.items() %}
+    case {{property_id}}:
+        {% if property.longhands %}
+        return {% for longhand_id in property.longhand_property_ids %}propertiesEqual({{longhand_id}}, a, b) {% if not loop.last %}&& {% endif %}{% endfor %};
+        {% elif property.animation or property.transition %}
+        return dataEquivalent(a.{{property.getter}}List(), b.{{property.getter}}List());
+        {% elif property.custom_all %}
+        return CSSPropertyEqualityCustom::{{property_id}}Equal(a, b);
+        {% elif property.use_handlers_for %}
+        return propertiesEqual({{property.use_handlers_for}}, a, b);
+        {% elif property.font %}
+        return dataEquivalent(a.getFontDescription().{{property.getter}}(), b.getFontDescription().{{property.getter}}());
+        {% elif property.builder_skip %}
+        return true;
+        {% elif property.svg %}
+        return dataEquivalent(a.svgStyle().{{property.getter}}(), b.svgStyle().{{property.getter}}());
+        {% else %}
+        return dataEquivalent(a.{{property.getter}}(), b.{{property.getter}}());
+        {% endif %}
+    {% endfor %}
+    default:
+        ASSERT_NOT_REACHED();
+        return true;
+    }
+}
+
+} // namespace blink