Move logic of recording main thread scrolling reasons from cc to blink::ScrollManager

third_party/WebKit/Source/core/input/ScrollManager.h

Index: third_party/WebKit/Source/core/input/ScrollManager.h
diff --git a/third_party/WebKit/Source/core/input/ScrollManager.h b/third_party/WebKit/Source/core/input/ScrollManager.h
index 34cb0a22e7516e5bd13c7d778b2d4c1a0dbd7bbd..8d4738ae9c770585f2145dc31e2e3080c7999e8d 100644
--- a/third_party/WebKit/Source/core/input/ScrollManager.h
+++ b/third_party/WebKit/Source/core/input/ScrollManager.h
@@ -111,6 +111,10 @@ class CORE_EXPORT ScrollManager
   void recomputeScrollChain(const Node& startNode,
                             std::deque<int>& scrollChain);
 
+  // Record non composited main thread scrolling reasons.

[bokan, 2017/03/28 15:30:16]

Nit: comment unneeded.

+  uint32_t computeNonCompositedMainThreadScrollingReasons();
+  void recordNonCompositedMainThreadScrollingReasons(const WebGestureDevice);
+
   // NOTE: If adding a new field to this class please ensure that it is
   // cleared in |ScrollManager::clear()|.