Expose multiline attribute from blink

Source/modules/accessibility/AXObject.cpp

Index: Source/modules/accessibility/AXObject.cpp
diff --git a/Source/modules/accessibility/AXObject.cpp b/Source/modules/accessibility/AXObject.cpp
index 90a72e45f9f2a2836ce7cd19e4c349bcaf4e3785..cc47059cc38e73302be1fa7038ded41c140587fb 100644
--- a/Source/modules/accessibility/AXObject.cpp
+++ b/Source/modules/accessibility/AXObject.cpp
@@ -518,8 +518,15 @@ AccessibilityButtonState AXObject::checkboxOrRadioValue() const
     return ButtonStateOff;
 }
 
-bool AXObject::ariaIsMultiline() const
+bool AXObject::isMultiline() const

[dmazzoni, 2015/03/30 06:17:54]

Let's do two more things while you're at it so that this is totally accurate

* If it's contenteditable (node->hasEditableStyle()), it should return true by
default 
* If it's not an editable text node at all (if isNativeTextControl() and
isNonNativeTextControl() both return false), it should always return false -
i.e. we shouldn't allow aria-multiline on a button or a div with no role

[shreeramk, 2015/03/30 06:36:28]

You mean to say this??
if (isNativeTextControl() && isNonNativeTextControl())
        return false;

Because the implementation of both are like if one is true other would be false
and vice-versa.

 {
+    Node* node = this->node();
+    if (!node)
+        return false;
+
+    if (isHTMLTextAreaElement(*node))
+        return true;
+
     return equalIgnoringCase(getAttribute(aria_multilineAttr), "true");
 }