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

third_party/WebKit/Source/core/frame/FrameView.h

Index: third_party/WebKit/Source/core/frame/FrameView.h
diff --git a/third_party/WebKit/Source/core/frame/FrameView.h b/third_party/WebKit/Source/core/frame/FrameView.h
index 1dd516b9b577cb851b1ad5821a52f013a6483eb3..827969c89f29e05cca150a4fc6828c85e5e1d663 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.h
+++ b/third_party/WebKit/Source/core/frame/FrameView.h
@@ -803,6 +803,9 @@
   // Main thread scrolling reasons for this object only. For all reasons,
   // see: mainThreadScrollingReasons().
   MainThreadScrollingReasons MainThreadScrollingReasonsPerFrame() const;
+  void AdjustStyleRelatedMainThreadScrollingReasons(const uint32_t reason,
+                                                    bool increase);
+  MainThreadScrollingReasons GetStyleRelatedMainThreadScrollingReasons() const;
 
   bool HasVisibleSlowRepaintViewportConstrainedObjects() const;
 
@@ -1218,6 +1221,11 @@
 
   bool is_storing_composited_layer_debug_info_;
   MainThreadScrollingReasons main_thread_scrolling_reasons_;
+  // For recording main thread scrolling reasons
+  // due to layout object properties. e.g. opacity, transform.
+  // The size of the vector depends on the number of
+  // main thread scrolling reasons.
+  Vector<int> main_thread_scrolling_reasons_counter_;
 
   // TODO(kenrb): Remove these when https://crbug.com/680606 is resolved.
   std::unique_ptr<CompositorAnimationTimeline> animation_timeline_;