Add country combobox to change country and rebuild address inputs.

chrome/browser/ui/autofill/autofill_dialog_view_delegate.h

Index: chrome/browser/ui/autofill/autofill_dialog_view_delegate.h
diff --git a/chrome/browser/ui/autofill/autofill_dialog_view_delegate.h b/chrome/browser/ui/autofill/autofill_dialog_view_delegate.h
index d102dfb0817554e25df3c9572aa3251a51ab4183..9371262c4061a3d3dc33a0071a1c689b1fbb354c 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_view_delegate.h
+++ b/chrome/browser/ui/autofill/autofill_dialog_view_delegate.h
@@ -154,9 +154,9 @@ class AutofillDialogViewDelegate {
   virtual ValidityMessages InputsAreValid(DialogSection section,
                                           const FieldValueMap& inputs) = 0;
 
-  // Called when the user changes the contents of a text field or activates it
-  // (by focusing and then clicking it). |was_edit| is true when the function
-  // was called in response to the user editing the text field.
+  // Called when the user edits or activates a textfield or combobox.
+  // |was_edit| is true when the function was called in response to the user
+  // editing the input.
   virtual void UserEditedOrActivatedInput(DialogSection section,
                                           ServerFieldType type,
                                           gfx::NativeView parent_view,