[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..f62b6e2e2581edffb557a8d1754914514c780e42 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -104,6 +104,7 @@ class WebCompositorOutputSurface;
 class WebDOMMessageEvent;
 class WebDataSource;
 class WebDragData;
+class WebFormElement;
 class WebGeolocationClient;
 class WebGestureEvent;
 class WebIconURL;
@@ -454,6 +455,8 @@ 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);