Send lostpointercapture on touch capturing

third_party/WebKit/Source/core/events/PointerEventFactory.cpp

Index: third_party/WebKit/Source/core/events/PointerEventFactory.cpp
diff --git a/third_party/WebKit/Source/core/events/PointerEventFactory.cpp b/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
index 04490da249950fe039c2c8180037c7427548963f..a86ba84b0552390c7ab5a2b9eebbd5a79840b58d 100644
--- a/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
+++ b/third_party/WebKit/Source/core/events/PointerEventFactory.cpp
@@ -62,17 +62,20 @@ float getPointerEventPressure(float force, int buttons)
     return force;
 }
 
-void PointerEventFactory::setIdTypeButtons(PointerEventInit &pointerEventInit,
+bool PointerEventFactory::setIdTypeButtons(PointerEventInit &pointerEventInit,
     const WebPointerProperties &pointerProperties, unsigned buttons)
 {
     const WebPointerProperties::PointerType pointerType = pointerProperties.pointerType;
     const IncomingId incomingId(pointerType, pointerProperties.id);
+    int previousCurrentId = m_currentId;
     int pointerId = addIdAndActiveButtons(incomingId, buttons != 0);
 
     pointerEventInit.setButtons(buttons);
     pointerEventInit.setPointerId(pointerId);
     pointerEventInit.setPointerType(pointerTypeNameForWebPointPointerType(pointerType));
     pointerEventInit.setIsPrimary(isPrimary(pointerId));
+
+    return previousCurrentId != m_currentId;
 }
 
 PassRefPtrWillBeRawPtr<PointerEvent> PointerEventFactory::create(
@@ -128,7 +131,7 @@ PassRefPtrWillBeRawPtr<PointerEvent> PointerEventFactory::create(
 PassRefPtrWillBeRawPtr<PointerEvent> PointerEventFactory::create(const AtomicString& type,
     const PlatformTouchPoint& touchPoint, PlatformEvent::Modifiers modifiers,
     const double width, const double height,
-    const double clientX, const double clientY)
+    const double clientX, const double clientY, bool &isNew)
 {
     const PlatformTouchPoint::TouchState pointState = touchPoint.state();
 
@@ -143,7 +146,7 @@ PassRefPtrWillBeRawPtr<PointerEvent> PointerEventFactory::create(const AtomicStr
 
     PointerEventInit pointerEventInit;
 
-    setIdTypeButtons(pointerEventInit, touchPoint.pointerProperties(),
+    isNew = setIdTypeButtons(pointerEventInit, touchPoint.pointerProperties(),
         pointerReleasedOrCancelled ? 0 : 1);
 
     pointerEventInit.setWidth(width);