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

chrome/renderer/autofill/autofill_agent.h

Index: chrome/renderer/autofill/autofill_agent.h
diff --git a/chrome/renderer/autofill/autofill_agent.h b/chrome/renderer/autofill/autofill_agent.h
index 89f0a31c0084810a26752b1b56d7a7851c3d3f3a..183a2053249e74313a282d384a2662d7a9667a7f 100644
--- a/chrome/renderer/autofill/autofill_agent.h
+++ b/chrome/renderer/autofill/autofill_agent.h
@@ -60,6 +60,8 @@ class AutofillAgent : public content::RenderViewObserver,
                               const WebKit::WebFormElement& form) OVERRIDE;
   virtual void ZoomLevelChanged() OVERRIDE;
   virtual void DidChangeScrollOffset(WebKit::WebFrame* frame) OVERRIDE;
+  virtual void RequestAutocomplete(WebKit::WebFrame* frame,
+                                   const WebKit::WebFormElement& form) OVERRIDE;
 
   // PageClickListener:
   virtual bool InputElementClicked(const WebKit::WebInputElement& element,
@@ -108,6 +110,9 @@ class AutofillAgent : public content::RenderViewObserver,
   void OnAcceptDataListSuggestion(const string16& value);
   void OnAcceptPasswordAutofillSuggestion(const string16& value);
 
+  // For interactive autocomplete.
+  void OnRequestAutocompleteFinished(bool success);
+
   // Called in a posted task by textFieldDidChange() to work-around a WebKit bug
   // http://bugs.webkit.org/show_bug.cgi?id=16976
   void TextFieldDidChangeImpl(const WebKit::WebInputElement& element);
@@ -174,6 +179,10 @@ class AutofillAgent : public content::RenderViewObserver,
   // The element corresponding to the last request sent for form field Autofill.
   WebKit::WebInputElement element_;
 
+  // The element corresponding to the last request sent for an interactive
+  // autocomplete.
+  WebKit::WebFormElement form_;
+
   // The action to take when receiving Autofill data from the AutofillManager.
   AutofillAction autofill_action_;