Added ability to distinguished between rich and plain text editables on accessibility objects.

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 fe05ee518c85299802d3391f787731cb03284a7b..0208626b022e6c090e6038cf776ff2a9861d46dc 100644
--- a/Source/modules/accessibility/AXObject.cpp
+++ b/Source/modules/accessibility/AXObject.cpp
@@ -747,6 +747,18 @@ bool AXObject::isMultiline() const
     return equalIgnoringCase(getAttribute(aria_multilineAttr), "true");
 }
 
+bool AXObject::hasRichText() const
+{
+    Node* node = this->node();
+    if (!node)
+        return false;
+
+    if (node->hasEditableStyle())

[dmazzoni, 2015/05/28 05:55:56]

This will return true for everything in the contenteditable subtree, is that
what you want?

Also, the spec allows contentEditable="plaintext-only" (see
http://w3c.github.io/editing-explainer/contentEditable.html), but in that case
this function would still return true, is that what you want?

Maybe Node::isContentRichlyEditable is better, but maybe add a test for that.

+        return true;
+
+    return false;
+}
+
 bool AXObject::ariaPressedIsPresent() const
 {
     return !getAttribute(aria_pressedAttr).isEmpty();