Merge 123180 - Introduce Node::shadowHost()

Source/WebCore/html/shadow/CalendarPickerElement.cpp

Index: Source/WebCore/html/shadow/CalendarPickerElement.cpp
===================================================================
--- Source/WebCore/html/shadow/CalendarPickerElement.cpp	(リビジョン 123547)
+++ Source/WebCore/html/shadow/CalendarPickerElement.cpp	(作業コピー)
@@ -81,9 +81,11 @@
 
 inline HTMLInputElement* CalendarPickerElement::hostInput()
 {
-    ASSERT(shadowAncestorNode());
-    ASSERT(shadowAncestorNode()->hasTagName(inputTag));
-    return static_cast<HTMLInputElement*>(shadowAncestorNode());
+    // JavaScript code can't create CalendarPickerElement objects. This is
+    // always in shadow of <input>.
+    ASSERT(shadowHost());
+    ASSERT(shadowHost()->hasTagName(inputTag));
+    return static_cast<HTMLInputElement*>(shadowHost());
 }
 
 void CalendarPickerElement::defaultEventHandler(Event* event)