Implement UIEvent.sourceDevice

Source/core/events/UIEvent.cpp

Index: Source/core/events/UIEvent.cpp
diff --git a/Source/core/events/UIEvent.cpp b/Source/core/events/UIEvent.cpp
index ad9c852c4eeea9e23caeb98164e3877925b0f24e..368b76e1a7e917b54c3934a3638559cec7982b06 100644
--- a/Source/core/events/UIEvent.cpp
+++ b/Source/core/events/UIEvent.cpp
@@ -23,11 +23,11 @@
 #include "config.h"
 #include "core/events/UIEvent.h"
 
-
 namespace blink {
 
 UIEvent::UIEvent()
     : m_detail(0)
+    , m_sourceDevice(InputDevice::create(false))

[Rick Byers, 2015/06/04 14:52:35]

These lines that create a source device out of nothing (without really knowing
where the event is coming from) are temporary, and we'll have to make sure we
find and remove them all before shipping source device.  So please add a comment
like this to each one:
"TODO(lanwei): Get correct InputDevice for this scenario"

 {
 }
 
@@ -35,6 +35,7 @@ UIEvent::UIEvent(const AtomicString& eventType, bool canBubbleArg, bool cancelab
     : Event(eventType, canBubbleArg, cancelableArg)
     , m_view(viewArg)
     , m_detail(detailArg)
+    , m_sourceDevice(InputDevice::create(false))
 {
 }
 
@@ -42,6 +43,7 @@ UIEvent::UIEvent(const AtomicString& eventType, const UIEventInit& initializer)
     : Event(eventType, initializer)
     , m_view(initializer.view())
     , m_detail(initializer.detail())
+    , m_sourceDevice(initializer.sourceDevice())
 {
 }
 
@@ -58,6 +60,7 @@ void UIEvent::initUIEvent(const AtomicString& typeArg, bool canBubbleArg, bool c
 
     m_view = viewArg;
     m_detail = detailArg;
+    m_sourceDevice = InputDevice::create(false);
 }
 
 bool UIEvent::isUIEvent() const
@@ -108,6 +111,7 @@ int UIEvent::which() const
 DEFINE_TRACE(UIEvent)
 {
     visitor->trace(m_view);
+    visitor->trace(m_sourceDevice);
     Event::trace(visitor);
 }