Move MapCoordinatesMode and MapCoordinatesFlags to a separate header.

third_party/WebKit/Source/core/layout/MapCoordinatesFlags.h

+// 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.
+
+#ifndef MapCoordinatesFlags_h
+#define MapCoordinatesFlags_h
+
+namespace blink {
+
+enum MapCoordinatesMode {
+  IsFixed = 1 << 0,
+  UseTransforms = 1 << 1,
+
+  // When walking up the containing block chain, applies a container flip for
+  // the first element found, if any, for which isFlippedBlocksWritingMode is
+  // true. This option should generally be used when mapping a source rect in
+  // the "physical coordinates with flipped block-flow" coordinate space (see
+  // LayoutBoxModelObject.h) to one in a physical destination space.
+  ApplyContainerFlip = 1 << 2,
+  TraverseDocumentBoundaries = 1 << 3,
+
+  // Applies to LayoutView::mapLocalToAncestor() and LayoutView::
+  // mapToVisualRectInAncestorSpace() only, to indicate the input point or rect
+  // is in frame coordinates instead of frame contents coordinates. This
+  // disables view clipping and scroll offset adjustment.
+  // TODO(wangxianzhu): Remove this when root-layer-scrolls launches.
+  InputIsInFrameCoordinates = 1 << 4,
+};
+typedef unsigned MapCoordinatesFlags;
+
+}  // namespace blink
+
+#endif  // MapCoordinatesFlags_h