Send got/lostpointercapture immediately if possible

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

Index: third_party/WebKit/Source/core/input/PointerEventManager.h
diff --git a/third_party/WebKit/Source/core/input/PointerEventManager.h b/third_party/WebKit/Source/core/input/PointerEventManager.h
index 0282b186827a60b0fd57a24facacd722e9a28484..219c3382d0a0f0dd3f296948aac6c403405a8996 100644
--- a/third_party/WebKit/Source/core/input/PointerEventManager.h
+++ b/third_party/WebKit/Source/core/input/PointerEventManager.h
@@ -20,9 +20,8 @@ class LocalFrame;
 
 // This class takes care of dispatching all pointer events and keeps track of
 // properties of active pointer events.
-class CORE_EXPORT PointerEventManager {
+class CORE_EXPORT PointerEventManager : public GarbageCollectedFinalized<EventHandler> {
     WTF_MAKE_NONCOPYABLE(PointerEventManager);
-    DISALLOW_NEW();
 public:
     explicit PointerEventManager(LocalFrame*);
     ~PointerEventManager();
@@ -128,6 +127,10 @@ private:
         const PlatformMouseEvent& = PlatformMouseEvent(),
         bool sendMouseEvent = false);
 
+    // Try to immediately send the got/lostpointercapture without boundary
+    // events.
+    void immediatelyProcessPendingPointerCapture(int pointerId);
+
     // Processes the capture state of a pointer, updates node under
     // pointer, and sends corresponding boundary events for pointer if
     // setPointerPosition is true. It also sends corresponding boundary events
@@ -150,7 +153,11 @@ private:
         EventTarget*,
         PointerEvent*,
         bool checkForListener = false);
-    void releasePointerCapture(int);
+    void modifyPendingPointerCapture(int pointerId, EventTarget*);
+    // Returns true if capture target and pending capture target were different.
+    bool getPointerCaptureState(int pointerId,
+        EventTarget** pointerCaptureTarget,
+        EventTarget** pendingPointerCaptureTarget);
 
     // NOTE: If adding a new field to this class please ensure that it is
     // cleared in |PointerEventManager::clear()|.