Populates sourceDevice attribute into MouseEvent

Source/core/events/MouseEvent.cpp

Index: Source/core/events/MouseEvent.cpp
diff --git a/Source/core/events/MouseEvent.cpp b/Source/core/events/MouseEvent.cpp
index cba1190a3047dba42be57d947a694f65d5184043..939585d00c261601e2548c8ba9cdd3feec6ea0c8 100644
--- a/Source/core/events/MouseEvent.cpp
+++ b/Source/core/events/MouseEvent.cpp
@@ -34,7 +34,7 @@ namespace blink {
 
 PassRefPtrWillBeRawPtr<MouseEvent> MouseEvent::create(ScriptState* scriptState, const AtomicString& type, const MouseEventInit& initializer)
 {
-    if (scriptState->world().isIsolatedWorld())
+    if (scriptState && scriptState->world().isIsolatedWorld())
         UIEventWithKeyState::didCreateEventInIsolatedWorld(initializer.ctrlKey(), initializer.altKey(), initializer.shiftKey(), initializer.metaKey());
     return adoptRefWillBeNoop(new MouseEvent(type, initializer));
 }
@@ -89,7 +89,8 @@ MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cance
     : MouseRelatedEvent(eventType, canBubble, cancelable, view, detail, IntPoint(screenX, screenY),
         IntPoint(windowX, windowY),
         IntPoint(movementX, movementY),
-        ctrlKey, altKey, shiftKey, metaKey, isSimulated)
+        ctrlKey, altKey, shiftKey, metaKey, isSimulated,
+        syntheticEventType == PlatformMouseEvent::FromTouch ? InputDevice::firesTouchEventsInputDevice() : InputDevice::doesntFireTouchEventsInputDevice())
     , m_button(button)
     , m_buttons(buttons)
     , m_relatedTarget(relatedTarget)
@@ -103,7 +104,7 @@ MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& init
     : MouseRelatedEvent(eventType, initializer.bubbles(), initializer.cancelable(), initializer.view(), initializer.detail(), IntPoint(initializer.screenX(), initializer.screenY()),
         IntPoint(0 /* pageX */, 0 /* pageY */),
         IntPoint(initializer.movementX(), initializer.movementY()),
-        initializer.ctrlKey(), initializer.altKey(), initializer.shiftKey(), initializer.metaKey(), false /* isSimulated */)
+        initializer.ctrlKey(), initializer.altKey(), initializer.shiftKey(), initializer.metaKey(), false /* isSimulated */, initializer.sourceDevice())
     , m_button(initializer.button())
     , m_buttons(initializer.buttons())
     , m_relatedTarget(initializer.relatedTarget())
@@ -284,7 +285,9 @@ bool MouseEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) cons
     // Special case: If it's a double click event, we also send the dblclick event. This is not part
     // of the DOM specs, but is used for compatibility with the ondblclick="" attribute. This is treated
     // as a separate event in other DOM-compliant browsers like Firefox, and so we do the same.
-    RefPtrWillBeRawPtr<MouseEvent> doubleClickEvent = MouseEvent::create();
+    MouseEventInit eventInitDict;
+    eventInitDict.setSourceDevice(event().sourceDevice());
+    RefPtrWillBeRawPtr<MouseEvent> doubleClickEvent = MouseEvent::create(nullptr, EventTypeNames::dblclick, eventInitDict);
     doubleClickEvent->initMouseEvent(nullptr, EventTypeNames::dblclick, event().bubbles(), event().cancelable(), event().view(),

[Rick Byers, 2015/06/25 03:34:54]

nit: You should really be using either an eventInitDict or initMouseEvent - not
both at once.  Can you just put all the things you need here into the init dict?

If not, I don't have a problem with an internal (i.e. not web exposed)
initMouseEvent method that includes an InputDevice argument - especially if you
can simply implement the web-exposed version of it in terms of your new
overload.

[lanwei, 2015/06/25 19:26:40]

Done.

         event().detail(), event().screenX(), event().screenY(), event().clientX(), event().clientY(),
         event().ctrlKey(), event().altKey(), event().shiftKey(), event().metaKey(),