Fire pointermoves for mousemove events.

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

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
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@@ skipping 273 matching lines @@
 
     // Returns true when the sent PE has defaultPrevented or defaultHandled set.
     bool dispatchPointerEventForMouseEvent(Node* target, const AtomicString& eventType, const PlatformMouseEvent&, Node* relatedTarget = nullptr);
 
     // Dispatches mouseover, mouseout, mouseenter and mouseleave events to appropriate nodes when the mouse pointer moves from one node to another.
     void sendMouseEventsForNodeTransition(Node*, Node*, const PlatformMouseEvent&);
 
     MouseEventWithHitTestResults prepareMouseEvent(const HitTestRequest&, const PlatformMouseEvent&);
 
     bool dispatchMouseEvent(const AtomicString& eventType, Node* target, int clickCount, const PlatformMouseEvent&);
+
+    // Dispatches ME after corresponding PE provided the PE has not been canceled. The eventType arg
+    // must be a mouse event that can be gated though a preventDefaulted pointerdown (i.e., one of
+    // {mousedown, mousemove, mouseup}).
+    bool dispatchPointerAndMouseEvent(const AtomicString& mouseEventType, Node* target,
+        int clickCount, const PlatformMouseEvent&);

[Rick Byers, 2015/10/30 17:21:29]

PlatformMouseEvent contains a clickCount, can you eliminate the clickCount
argument?

[mustaq, 2015/11/03 20:44:30]

I think PlatformMouse event doesn't maintain the clickcount needed by UI
MouseEvent, specially on mouse release. EventHandler caches the last count in
m_clickCount, I guess this is the only reason.

[Rick Byers, 2015/11/03 20:59:56]

Ok.  Seems like a wart to me that might not be too hard to clean up somehow. 
Care to add a TODO?  At the very least the different semantics should be
documented in comments / argument names (maybe there's a distinction between the
pre-event-click-count and the post-event-click-count?).

[mustaq, 2015/11/03 21:37:34]

Added a TODO.

+
     bool dispatchDragEvent(const AtomicString& eventType, Node* target, const PlatformMouseEvent&, DataTransfer*);
 
     void clearDragDataTransfer();
 
     bool handleDrag(const MouseEventWithHitTestResults&, DragInitiator);
     bool tryStartDrag(const MouseEventWithHitTestResults&);
     void clearDragState();
 
     bool dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent&);
 
@@ skipping 147 matching lines @@
     // scroll which shouldn't propagate can't cause any element to
     // scroll other than the |m_previousGestureScrolledNode|.
     bool m_deltaConsumedForScrollSequence;
 };
 
 } // namespace blink
 
 WTF_ALLOW_INIT_WITH_MEM_FUNCTIONS(blink::EventHandler::TouchInfo);
 
 #endif // EventHandler_h