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

chrome/common/autofill_messages.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Multiply-included message file, hence no include guard.
 
 #include <string>
 
 #include "base/time.h"
 #include "chrome/common/common_param_traits_macros.h"
@@ skipping 173 matching lines @@
                     FormFieldData /* the form field  */,
                     int /* profile unique ID */)
 
 // Sent when a form is previewed with Autofill suggestions.
 IPC_MESSAGE_ROUTED0(AutofillHostMsg_DidPreviewAutofillFormData)
 
 // Sent when a form is filled with Autofill suggestions.
 IPC_MESSAGE_ROUTED1(AutofillHostMsg_DidFillAutofillFormData,
                     base::TimeTicks /* timestamp */)
 
+// Send when a form receives a request to do interactive autocomplete.
+IPC_MESSAGE_ROUTED1(AutofillHostMsg_RequestAutocomplete,
+                    FormData /* the form */)
+
 // Instructs the browser to remove the specified Autocomplete entry from the
 // database.
 IPC_MESSAGE_ROUTED2(AutofillHostMsg_RemoveAutocompleteEntry,
                     string16 /* field name */,
                     string16 /* value */)
 
 // Instructs the browser to show the Autofill dialog.
 IPC_MESSAGE_ROUTED0(AutofillHostMsg_ShowAutofillDialog)
 
 // Send when a text field is done editing.
@@ skipping 21 matching lines @@
                     FormFieldData /* the form field */,
                     gfx::Rect /* input field bounds, window-relative */,
                     std::vector<string16> /* suggestions */)
 
 // Inform browser of data list values for the curent field.
 IPC_MESSAGE_ROUTED4(AutofillHostMsg_SetDataList,
                     std::vector<string16> /* values */,
                     std::vector<string16> /* labels */,
                     std::vector<string16> /* icons */,
                     std::vector<int> /* unique ids */)