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..cffec1515a15c701157d5410f9b0d7813f8f7178 100644
--- a/Source/core/events/MouseEvent.cpp
+++ b/Source/core/events/MouseEvent.cpp
@@ -97,13 +97,17 @@ MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cance
     , m_syntheticEventType(syntheticEventType)
 {
     setUICreateTime(uiCreateTime);
+    if (syntheticEventType == PlatformMouseEvent::FromTouch)
+        setSourceDevice(InputDevice::firesTouchEventsInputDevice());
+    else
+        setSourceDevice(InputDevice::doesntFireTouchEventsInputDevice());
 }
 
 MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& initializer)
     : 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())
@@ -134,7 +138,7 @@ unsigned short MouseEvent::platformModifiersToButtons(unsigned modifiers)
 void MouseEvent::initMouseEvent(ScriptState* scriptState, const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<AbstractView> view,
                                 int detail, int screenX, int screenY, int clientX, int clientY,
                                 bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
-                                short button, PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, unsigned short buttons)
+                                short button, PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, InputDevice* sourceDevice, unsigned short buttons)
 {
     if (dispatched())
         return;
@@ -142,7 +146,7 @@ void MouseEvent::initMouseEvent(ScriptState* scriptState, const AtomicString& ty
     if (scriptState && scriptState->world().isIsolatedWorld())
         UIEventWithKeyState::didCreateEventInIsolatedWorld(ctrlKey, altKey, shiftKey, metaKey);
 
-    initUIEvent(type, canBubble, cancelable, view, detail);
+    initUIEvent(type, canBubble, cancelable, view, detail, sourceDevice);
 
     m_screenLocation = IntPoint(screenX, screenY);
     m_ctrlKey = ctrlKey;
@@ -159,6 +163,12 @@ void MouseEvent::initMouseEvent(ScriptState* scriptState, const AtomicString& ty
     // FIXME: m_dataTransfer is not set to nullptr here.
 }
 
+void MouseEvent::initMouseEvent(ScriptState* scriptState, const AtomicString& type, bool canBubble, bool cancelable, PassRefPtrWillBeRawPtr<AbstractView> view, int detail, int screenX, int screenY,
+    int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, short button, PassRefPtrWillBeRawPtr<EventTarget> relatedTarget, unsigned short buttons)
+{
+    initMouseEvent(scriptState, type, canBubble, cancelable, view, detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget, nullptr, buttons);
+}
+
 const AtomicString& MouseEvent::interfaceName() const
 {
     return EventNames::MouseEvent;
@@ -288,7 +298,7 @@ bool MouseEventDispatchMediator::dispatchEvent(EventDispatcher& dispatcher) cons
     doubleClickEvent->initMouseEvent(nullptr, EventTypeNames::dblclick, event().bubbles(), event().cancelable(), event().view(),
         event().detail(), event().screenX(), event().screenY(), event().clientX(), event().clientY(),
         event().ctrlKey(), event().altKey(), event().shiftKey(), event().metaKey(),
-        event().button(), relatedTarget, event().buttons());
+        event().button(), relatedTarget, event().sourceDevice(), event().buttons());
     if (event().defaultHandled())
         doubleClickEvent->setDefaultHandled();
     EventDispatcher::dispatchEvent(dispatcher.node(), MouseEventDispatchMediator::create(doubleClickEvent));