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diff --git a/Source/WebCore/rendering/style/RenderStyleConstants.cpp b/Source/WebCore/rendering/style/RenderStyleConstants.cpp
new file mode 100644
index 000000000..f13cd7bd9
--- /dev/null
+++ b/Source/WebCore/rendering/style/RenderStyleConstants.cpp
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+/*
+ * Copyright (C) 2015 Apple Inc.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "RenderStyleConstants.h"
+
+#include "TextStream.h"
+
+namespace WebCore {
+
+TextStream& operator<<(TextStream& ts, EFillSizeType sizeType)
+{
+    switch (sizeType) {
+    case Contain: ts << "contain"; break;
+    case Cover: ts << "cover"; break;
+    case SizeLength: ts << "size-length"; break;
+    case SizeNone: ts << "size-none"; break;
+    }
+    
+    return ts;
+}
+
+TextStream& operator<<(TextStream& ts, EFillAttachment attachment)
+{
+    switch (attachment) {
+    case ScrollBackgroundAttachment: ts << "scroll"; break;
+    case LocalBackgroundAttachment: ts << "local"; break;
+    case FixedBackgroundAttachment: ts << "fixed"; break;
+    }
+    return ts;
+}
+
+TextStream& operator<<(TextStream& ts, EFillBox fill)
+{
+    switch (fill) {
+    case BorderFillBox: ts << "border"; break;
+    case PaddingFillBox: ts << "padding"; break;
+    case ContentFillBox: ts << "content"; break;
+    case TextFillBox: ts << "text"; break;
+    }
+    return ts;
+}
+
+TextStream& operator<<(TextStream& ts, EFillRepeat repeat)
+{
+    switch (repeat) {
+    case RepeatFill: ts << "repeat"; break;
+    case NoRepeatFill: ts << "no-repeat"; break;
+    case RoundFill: ts << "round"; break;
+    case SpaceFill: ts << "space"; break;
+    }
+
+    return ts;
+}
+
+TextStream& operator<<(TextStream& ts, EMaskSourceType maskSource)
+{
+    switch (maskSource) {
+    case MaskAlpha: ts << "alpha"; break;
+    case MaskLuminance: ts << "luminance"; break;
+    }
+
+    return ts;
+}
+
+TextStream& operator<<(TextStream& ts, Edge edge)
+{
+    switch (edge) {
+    case Edge::Top: ts << "top"; break;
+    case Edge::Right: ts << "right"; break;
+    case Edge::Bottom: ts << "bottom"; break;
+    case Edge::Left: ts << "left"; break;
+    }
+    return ts;
+}
+
+bool alwaysPageBreak(BreakBetween between)
+{
+    return between >= PageBreakBetween;
+}
+
+} // namespace WebCore