unique_ptr_migration: clean up references to scoped_ptr as of r389721

ui/accessibility/ax_node_data.h

Index: ui/accessibility/ax_node_data.h
diff --git a/ui/accessibility/ax_node_data.h b/ui/accessibility/ax_node_data.h
index 72ca3421aff7f534839bf6ad4063baf4d08f2773..c3d6948ddda86bd2dcdefba8949e83f5de466215 100644
--- a/ui/accessibility/ax_node_data.h
+++ b/ui/accessibility/ax_node_data.h
@@ -8,10 +8,10 @@
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
 
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_split.h"
 #include "ui/accessibility/ax_enums.h"
@@ -117,7 +117,7 @@ struct AX_EXPORT AXNodeData {
   gfx::Rect location;
 
   // An additional transform to apply to position this object and its subtree.
-  // NOTE: this member is a scoped_ptr because it's rare and gfx::Transform
+  // NOTE: this member is a std::unique_ptr because it's rare and gfx::Transform
   // takes up a fair amount of space. The assignment operator and copy
   // constructor both make a duplicate of the owned pointer, so it acts more
   // like a member than a pointer.