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..0db257bf15d57c59af4a3ac083a925833b865b25 100644
--- a/third_party/WebKit/Source/core/input/PointerEventManager.h
+++ b/third_party/WebKit/Source/core/input/PointerEventManager.h
@@ -128,6 +128,10 @@ private:
         const PlatformMouseEvent& = PlatformMouseEvent(),
         bool sendMouseEvent = false);
 
+    // Try to immediately send the got/lostpointercapture without boundary
+    // events.
+    void immediateProcessPendingPointerCapture(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
@@ -151,6 +155,10 @@ private:
         PointerEvent*,
         bool checkForListener = false);
     void releasePointerCapture(int);
+    // 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()|.