Revert "Revert 3 mac autofill CLs."

components/autofill/core/browser/autofill_driver.h

Index: components/autofill/core/browser/autofill_driver.h
diff --git a/components/autofill/core/browser/autofill_driver.h b/components/autofill/core/browser/autofill_driver.h
index efc5696ccc0b2d4fed3b9dadf67e8a09c99bd01e..748ad6e5b4a87be08347eae195f74e5700da2b7b 100644
--- a/components/autofill/core/browser/autofill_driver.h
+++ b/components/autofill/core/browser/autofill_driver.h
@@ -58,6 +58,9 @@ class AutofillDriver {
                                       RendererFormDataAction action,
                                       const FormData& data) = 0;
 
+  // Pings renderer. The renderer will return an IPC acknowledging the ping.
+  virtual void PingRenderer() = 0;
+
   // Sends the field type predictions specified in |forms| to the renderer. This
   // method is a no-op if the renderer is not available or the appropriate
   // command-line flag is not set.
@@ -81,7 +84,6 @@ class AutofillDriver {
   // Tells the renderer to preview the node with suggested text.
   virtual void RendererShouldPreviewFieldWithValue(
       const base::string16& value) = 0;
-
 };
 
 }  // namespace autofill