rAc: split TestableAutofillDialogView implementation into its own class

chrome/browser/ui/autofill/autofill_dialog_view.h

Index: chrome/browser/ui/autofill/autofill_dialog_view.h
diff --git a/chrome/browser/ui/autofill/autofill_dialog_view.h b/chrome/browser/ui/autofill/autofill_dialog_view.h
index d0747693533906846fc4aeb63e67b57803d6f5d9..764b0ba03c6b293ae10fcf101d085c6b05dce5d1 100644
--- a/chrome/browser/ui/autofill/autofill_dialog_view.h
+++ b/chrome/browser/ui/autofill/autofill_dialog_view.h
@@ -19,7 +19,6 @@ class Size;
 namespace autofill {
 
 class AutofillDialogViewDelegate;
-class TestableAutofillDialogView;
 
 // An interface for the dialog that appears when a site initiates an Autofill
 // action via the imperative autocomplete API.
@@ -98,10 +97,6 @@ class AutofillDialogView {
   // Called when the active suggestions data model changed.
   virtual void ModelChanged() = 0;
 
-  // Returns an object that can be used to test that the view is behaving as
-  // expected.
-  virtual TestableAutofillDialogView* GetTestableView() = 0;
-
   // Called by AutofillDialogSignInDelegate when the sign-in page experiences a
   // resize. |pref_size| is the new preferred size of the sign-in page.
   virtual void OnSignInResize(const gfx::Size& pref_size) = 0;