Make StyleRareNonInheritedData::draggable_regions a bit field.

third_party/WebKit/Source/core/style/StyleRareNonInheritedData.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,
@@ skipping 60 matching lines @@
               "StyleRareNonInheritedData_should_stay_small");
 
 StyleRareNonInheritedData::StyleRareNonInheritedData()
     : opacity(ComputedStyle::InitialOpacity()),
       perspective_(ComputedStyle::InitialPerspective()),
       shape_image_threshold_(ComputedStyle::InitialShapeImageThreshold()),
       order_(ComputedStyle::InitialOrder()),
       perspective_origin_(ComputedStyle::InitialPerspectiveOrigin()),
       object_position_(ComputedStyle::InitialObjectPosition()),
       line_clamp(ComputedStyle::InitialLineClamp()),
-      draggable_region_mode_(kDraggableRegionNone),
+      draggable_region_mode_(static_cast<unsigned>(kDraggableRegionNone)),
       shape_outside_(ComputedStyle::InitialShapeOutside()),
       clip_path_(ComputedStyle::InitialClipPath()),
       mask_(kMaskFillLayer, true),
       mask_box_image_(NinePieceImage::MaskDefaults()),
       page_size_(),
       shape_margin_(ComputedStyle::InitialShapeMargin()),
       text_decoration_color_(StyleColor::CurrentColor()),
       visited_link_text_decoration_color_(StyleColor::CurrentColor()),
       visited_link_background_color_(ComputedStyle::InitialBackgroundColor()),
       visited_link_outline_color_(StyleColor::CurrentColor()),
@@ skipping 231 matching lines @@
     const StyleRareNonInheritedData& o) const {
   return DataEquivalent(shape_outside_, o.shape_outside_);
 }
 
 bool StyleRareNonInheritedData::ClipPathDataEquivalent(
     const StyleRareNonInheritedData& o) const {
   return DataEquivalent(clip_path_, o.clip_path_);
 }
 
 }  // namespace blink