[autofill] Adding new API to request an interactive autocomplete UI flow.

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index c3b0dc8ee49d703845843d47bcdb0ade9076aaf7..d83109d0ee41ef023fb535e38e3b97a0b16d7df3 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -454,6 +454,8 @@ class RenderViewImpl : public RenderWidget,
                                      bool event_swallowed) OVERRIDE;
   virtual WebKit::WebColorChooser* createColorChooser(
       WebKit::WebColorChooserClient*, const WebKit::WebColor& initial_color);
+  virtual void requestAutocomplete(WebKit::WebFrame* frame,
+                                   const WebKit::WebFormElement& form);
   virtual bool runFileChooser(
       const WebKit::WebFileChooserParams& params,
       WebKit::WebFileChooserCompletion* chooser_completion);