blink: Make WebMainThreadScrollingReason wrap the cc enum.

cc/blink/web_layer_impl.h

 // Copyright 2014 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 CC_BLINK_WEB_LAYER_IMPL_H_
 #define CC_BLINK_WEB_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <string>
 #include <utility>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/blink/cc_blink_export.h"
 #include "cc/layers/layer_client.h"
 #include "third_party/WebKit/public/platform/WebCString.h"
 #include "third_party/WebKit/public/platform/WebColor.h"
 #include "third_party/WebKit/public/platform/WebCompositorAnimation.h"
 #include "third_party/WebKit/public/platform/WebDoublePoint.h"
 #include "third_party/WebKit/public/platform/WebFloatPoint.h"
 #include "third_party/WebKit/public/platform/WebLayer.h"
-#include "third_party/WebKit/public/platform/WebMainThreadScrollingReason.h"
 #include "third_party/WebKit/public/platform/WebPoint.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebSize.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "third_party/skia/include/utils/SkMatrix44.h"
 
 namespace blink {
 class WebFilterOperations;
 struct WebFloatRect;
@@ skipping 87 matching lines @@
   void setScrollClipLayer(blink::WebLayer* clip_layer) override;
   bool scrollable() const override;
   void setUserScrollable(bool horizontal, bool vertical) override;
   bool userScrollableHorizontal() const override;
   bool userScrollableVertical() const override;
   void setHaveWheelEventHandlers(bool have_wheel_event_handlers) override;
   bool haveWheelEventHandlers() const override;
   void setHaveScrollEventHandlers(bool have_scroll_event_handlers) override;
   bool haveScrollEventHandlers() const override;
   void addMainThreadScrollingReasons(
-      blink::WebMainThreadScrollingReason::WebMainThreadScrollingReason
-          main_thread_scrolling_reasons) override;
+      uint32_t main_thread_scrolling_reasons) override;
   void clearMainThreadScrollingReasons() override;
   bool shouldScrollOnMainThread() const override;
   void setNonFastScrollableRegion(
       const blink::WebVector<blink::WebRect>& region) override;
   blink::WebVector<blink::WebRect> nonFastScrollableRegion() const override;
   void setTouchEventHandlerRegion(
       const blink::WebVector<blink::WebRect>& region) override;
   blink::WebVector<blink::WebRect> touchEventHandlerRegion() const override;
   void setScrollBlocksOn(blink::WebScrollBlocksOn) override;
   blink::WebScrollBlocksOn scrollBlocksOn() const override;
@@ skipping 26 matching lines @@
 
  private:
   scoped_ptr<WebToCCAnimationDelegateAdapter> animation_delegate_adapter_;
 
   DISALLOW_COPY_AND_ASSIGN(WebLayerImpl);
 };
 
 }  // namespace cc_blink
 
 #endif  // CC_BLINK_WEB_LAYER_IMPL_H_