Extract AutofillDialogController interface and common utilities.

chrome/browser/ui/autofill/autofill_dialog_controller_impl.h

Index: chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
diff --git a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
index fcc664d2f78b510c0910244589b8fb90c2b51151..511c94f600adffcf113c691554ce213159f94f82 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
+++ b/chrome/browser/ui/autofill/autofill_dialog_controller_impl.h
@@ -14,6 +14,7 @@
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "chrome/browser/ui/autofill/account_chooser_model.h"
+#include "chrome/browser/ui/autofill/autofill_dialog_controller.h"
 #include "chrome/browser/ui/autofill/autofill_dialog_models.h"
 #include "chrome/browser/ui/autofill/autofill_dialog_types.h"
 #include "chrome/browser/ui/autofill/autofill_dialog_view_delegate.h"
@@ -67,6 +68,7 @@ class WalletSigninHelper;
 // This class drives the dialog that appears when a site uses the imperative
 // autocomplete API to fill out a form.
 class AutofillDialogControllerImpl : public AutofillDialogViewDelegate,
+                                     public AutofillDialogController,
                                      public AutofillPopupDelegate,
                                      public content::NotificationObserver,
                                      public SuggestionsMenuModelDelegate,
@@ -87,25 +89,16 @@ class AutofillDialogControllerImpl : public AutofillDialogViewDelegate,
 
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
 
-  void Show();
-  void Hide();
-
-  // Called when the tab hosting this dialog is activated by a user gesture.
-  // Used to trigger a refresh of the user's Wallet data.
-  void TabActivated();
-
-  // Adds a step in the flow to the Autocheckout UI.
-  void AddAutocheckoutStep(AutocheckoutStepType step_type);
-
-  // Updates the status of a step in the Autocheckout UI.
-  void UpdateAutocheckoutStep(AutocheckoutStepType step_type,
-                              AutocheckoutStepStatus step_status);
-
-  // Called when there is an error in an active Autocheckout flow.
-  void OnAutocheckoutError();
-
-  // Called when an Autocheckout flow completes successfully.
-  void OnAutocheckoutSuccess();
+  // AutofillDialogController implementation.
+  virtual void Show() OVERRIDE;
+  virtual void Hide() OVERRIDE;
+  virtual void TabActivated() OVERRIDE;
+  virtual void AddAutocheckoutStep(AutocheckoutStepType step_type) OVERRIDE;
+  virtual void UpdateAutocheckoutStep(
+      AutocheckoutStepType step_type,
+      AutocheckoutStepStatus step_status) OVERRIDE;
+  virtual void OnAutocheckoutError() OVERRIDE;
+  virtual void OnAutocheckoutSuccess() OVERRIDE;
 
   // Returns |view_| as a testable version of itself (if |view_| exists and
   // actually implements |AutofillDialogView::GetTestableView()|).