Revert of Generate StyleBackgroundData in ComputedStyleBase.

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

+/*
+ * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "core/style/StyleBackgroundData.h"
+
+#include "core/style/ComputedStyle.h"
+#include "core/style/ComputedStyleConstants.h"
+
+namespace blink {
+
+StyleBackgroundData::StyleBackgroundData()
+    : background_(kBackgroundFillLayer, true),
+      color_(ComputedStyle::InitialBackgroundColor()) {}
+
+StyleBackgroundData::StyleBackgroundData(const StyleBackgroundData& o)
+    : RefCounted<StyleBackgroundData>(),
+      background_(o.background_),
+      color_(o.color_) {}
+
+bool StyleBackgroundData::operator==(const StyleBackgroundData& o) const {
+  return background_ == o.background_ && color_ == o.color_;
+}
+
+}  // namespace blink