Implement accessibility support for CSS-transformed iframes.

ui/accessibility/ax_node_data.cc

Index: ui/accessibility/ax_node_data.cc
diff --git a/ui/accessibility/ax_node_data.cc b/ui/accessibility/ax_node_data.cc
index 3738db14993ae17f98231b2372dd736c4bab32b4..cf3fb3ffad7438c5491c64aec8ad0374167b1279 100644
--- a/ui/accessibility/ax_node_data.cc
+++ b/ui/accessibility/ax_node_data.cc
@@ -309,6 +309,9 @@ std::string AXNodeData::ToString() const {
                    IntToString(location.width()) + ", " +
                    IntToString(location.height()) + ")";
 
+  if (!transform.IsIdentity())
+    result += " transform=" + transform.ToString();
+
   for (size_t i = 0; i < int_attributes.size(); ++i) {
     std::string value = IntToString(int_attributes[i].second);
     switch (int_attributes[i].first) {