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 6c2be7658a8d211ad808969c23d4f650896af116..8e42031deac150d3bbc17f0009433d7760d6075b 100644
--- a/ui/accessibility/ax_node_data.cc
+++ b/ui/accessibility/ax_node_data.cc
@@ -13,6 +13,7 @@
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "ui/gfx/transform.h"
 
 using base::DoubleToString;
 using base::IntToString;
@@ -69,7 +70,6 @@ AXNodeData::AXNodeData(const AXNodeData& other) {
   id = other.id;
   role = other.role;
   state = other.state;
-  location = other.location;
   string_attributes = other.string_attributes;
   int_attributes = other.int_attributes;
   float_attributes = other.float_attributes;
@@ -77,13 +77,15 @@ AXNodeData::AXNodeData(const AXNodeData& other) {
   intlist_attributes = other.intlist_attributes;
   html_attributes = other.html_attributes;
   child_ids = other.child_ids;
+  location = other.location;
+  if (other.transform)
+    transform.reset(new gfx::Transform(*other.transform));
 }
 
 AXNodeData& AXNodeData::operator=(AXNodeData other) {
   id = other.id;
   role = other.role;
   state = other.state;
-  location = other.location;
   string_attributes = other.string_attributes;
   int_attributes = other.int_attributes;
   float_attributes = other.float_attributes;
@@ -91,6 +93,9 @@ AXNodeData& AXNodeData::operator=(AXNodeData other) {
   intlist_attributes = other.intlist_attributes;
   html_attributes = other.html_attributes;
   child_ids = other.child_ids;
+  location = other.location;
+  if (other.transform)
+    transform.reset(new gfx::Transform(*other.transform));
   return *this;
 }
 
@@ -338,6 +343,9 @@ std::string AXNodeData::ToString() const {
                    IntToString(location.width()) + ", " +
                    IntToString(location.height()) + ")";
 
+  if (transform.get() && !transform->IsIdentity())

[dcheng, 2016/03/23 05:26:00]

Nit: no .get()

[dmazzoni, 2016/03/24 04:50:07]

Done.

+    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) {