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

chrome/renderer/autofill/autofill_agent.cc

Index: chrome/renderer/autofill/autofill_agent.cc
diff --git a/chrome/renderer/autofill/autofill_agent.cc b/chrome/renderer/autofill/autofill_agent.cc
index 3977caae7a9ab189390c0b0e182b6885247eba68..7f3dc69d05a7f7b3b2a83fd2437404a0ddb91c6e 100644
--- a/chrome/renderer/autofill/autofill_agent.cc
+++ b/chrome/renderer/autofill/autofill_agent.cc
@@ -54,6 +54,9 @@ const size_t kMaximumTextSizeForAutofill = 1000;
 // via IPC (to prevent long IPC messages).
 const size_t kMaximumDataListSizeForAutofill = 30;
 
+// A query counter for requests to show an interactive autocomplete UI.
+int request_autocomplete_query_id_ = 0;
+
 void AppendDataListSuggestions(const WebKit::WebInputElement& element,
                                std::vector<string16>* values,
                                std::vector<string16>* labels,
@@ -159,6 +162,8 @@ bool AutofillAgent::OnMessageReceived(const IPC::Message& message) {
                         OnAcceptDataListSuggestion)
     IPC_MESSAGE_HANDLER(AutofillMsg_AcceptPasswordAutofillSuggestion,
                         OnAcceptPasswordAutofillSuggestion)
+    IPC_MESSAGE_HANDLER(AutofillMsg_RequestAutocompleteFinished,
+                        OnRequestAutocompleteFinished)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -213,6 +218,29 @@ void AutofillAgent::DidChangeScrollOffset(WebKit::WebFrame*) {
   Send(new AutofillHostMsg_HideAutofillPopup(routing_id()));
 }
 
+void AutofillAgent::RequestAutocomplete(WebKit::WebFrame* frame,
+                                        const WebFormElement& form) {
+  request_autocomplete_query_id_ += 1;
+
+  // Cancel any pending autofill requests.
+  autofill_query_id_ += 1;
+
+  // Any popup currently showing is obsolete.
+  HidePopups();
+
+  FormData form_data;
+  if (WebFormElementToFormData(form,
+                               WebFormControlElement(),
+                               REQUIRE_AUTOCOMPLETE,
+                               EXTRACT_NONE,
+                               &form_data,
+                               NULL)) {
+    form_ = form;
+    Send(new AutofillHostMsg_RequestAutocomplete(
+        routing_id(), request_autocomplete_query_id_, form_data));
+  }
+}
+
 bool AutofillAgent::InputElementClicked(const WebInputElement& element,
                                         bool was_focused,
                                         bool is_focused) {
@@ -582,6 +610,12 @@ void AutofillAgent::OnAcceptPasswordAutofillSuggestion(const string16& value) {
   DCHECK(handled);
 }
 
+void AutofillAgent::OnRequestAutocompleteFinished(int query_id, bool success) {
+  DCHECK_GT(query_id, 0);
+  if (query_id == request_autocomplete_query_id_)
+    form_.dispatchAutocompleteEvent(success);
+}
+
 void AutofillAgent::ShowSuggestions(const WebInputElement& element,
                                     bool autofill_on_empty_values,
                                     bool requires_caret_at_end,
@@ -599,10 +633,7 @@ void AutofillAgent::ShowSuggestions(const WebInputElement& element,
        (element.selectionStart() != element.selectionEnd() ||
         element.selectionEnd() != static_cast<int>(value.length())))) {
     // Any popup currently showing is obsolete.
-    WebKit::WebView* web_view = render_view()->GetWebView();
-    if (web_view)
-      web_view->hidePopups();
-
+    HidePopups();
     return;
   }
 
@@ -702,4 +733,11 @@ void AutofillAgent::SetNodeText(const string16& value,
   node->setEditingValue(substring);
 }
 
+void AutofillAgent::HidePopups() {
+  WebKit::WebView* web_view = render_view()->GetWebView();
+  if (web_view)
+    web_view->hidePopups();
+}
+
+
 }  // namespace autofill