Notify Blink about start of gesture scroll through a queued event.

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

Index: third_party/WebKit/Source/core/input/EventHandler.h
diff --git a/third_party/WebKit/Source/core/input/EventHandler.h b/third_party/WebKit/Source/core/input/EventHandler.h
index 120a34142d882a8ad8c794251961e312c035e1c4..aa7c96c2b38e008cd933506a2dabd66c40c7afad 100644
--- a/third_party/WebKit/Source/core/input/EventHandler.h
+++ b/third_party/WebKit/Source/core/input/EventHandler.h
@@ -374,7 +374,6 @@ private:
     bool slideFocusOnShadowHostIfNecessary(const Element&);
 
     void dispatchPointerEvents(const PlatformTouchEvent&, WillBeHeapVector<TouchInfo>&);
-    void sendPointerCancels(WillBeHeapVector<TouchInfo>&);
 
     WebInputEventResult dispatchTouchEvents(const PlatformTouchEvent&, WillBeHeapVector<TouchInfo>&, bool, bool);
 
@@ -453,11 +452,6 @@ private:
 
     PointerEventManager m_pointerEventManager;
 
-    // This is set upon sending a pointercancel for touch, prevents PE dispatches for touches until
-    // all touch-points become inactive.
-    // TODO(mustaq): Consider a state per pointerType, as in PointerIdManager? Exclude mouse?
-    bool m_inPointerCanceledState;
-
     RefPtrWillBeMember<Node> m_scrollGestureHandlingNode;
     bool m_lastGestureScrollOverWidget;
     // The most recent element to scroll natively during this scroll