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 64676ad06ddac7566c1c47b94f4d3fb276efb861..578c9e40e85b0a2c68123e9a2395d85c67a6723e 100644
--- a/third_party/WebKit/Source/core/input/EventHandler.h
+++ b/third_party/WebKit/Source/core/input/EventHandler.h
@@ -379,7 +379,6 @@ private:
     bool slideFocusOnShadowHostIfNecessary(const Element&);
 
     void dispatchPointerEvents(const PlatformTouchEvent&, HeapVector<TouchInfo>&);
-    void sendPointerCancels(HeapVector<TouchInfo>&);
 
     WebInputEventResult dispatchTouchEvents(const PlatformTouchEvent&, HeapVector<TouchInfo>&, bool, bool);
 
@@ -458,11 +457,6 @@ 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;
-
     Member<Node> m_scrollGestureHandlingNode;
     bool m_lastGestureScrollOverWidget;
     // The most recent element to scroll natively during this scroll