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 28d492efe17bb49c64c946d25b1223f12db92269..bdd7a1e852df291b638408dba29a11fc6f0c6333 100644
--- a/third_party/WebKit/Source/core/input/ScrollManager.h
+++ b/third_party/WebKit/Source/core/input/ScrollManager.h
@@ -111,6 +111,9 @@ class CORE_EXPORT ScrollManager
   void RecomputeScrollChain(const Node& start_node,
                             std::deque<int>& scroll_chain);
 
+  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()|.