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

chrome/common/autofill_messages.h

Index: chrome/common/autofill_messages.h
diff --git a/chrome/common/autofill_messages.h b/chrome/common/autofill_messages.h
index faf7e3c514a488a213c194d6d58fdd5825fabfb4..7c2b533625ffdaaabf06a3a948366ed42abb9ef4 100644
--- a/chrome/common/autofill_messages.h
+++ b/chrome/common/autofill_messages.h
@@ -135,6 +135,11 @@ IPC_MESSAGE_ROUTED1(AutofillMsg_AcceptPasswordAutofillSuggestion,
 IPC_MESSAGE_ROUTED1(AutofillMsg_FormNotBlacklisted,
                     content::PasswordForm /* form checked */)
 
+// Sent when interactive autocomplete finishes.
+IPC_MESSAGE_ROUTED2(AutofillMsg_RequestAutocompleteFinished,
+                    int /* id of this message */,

[jam, 2012/10/26 20:09:38]

nit: here and below, by convention what's inside the comment is the name of the
parameter in the dispatcher. in this case, that'd be query_id, success

[Dan Beam, 2012/10/26 20:58:39]

Done.

+                    bool /* whether the request succeeded */)
+
 // Autofill messages sent from the renderer to the browser.
 
 // Notification that forms have been seen that are candidates for
@@ -191,6 +196,11 @@ IPC_MESSAGE_ROUTED0(AutofillHostMsg_DidPreviewAutofillFormData)
 IPC_MESSAGE_ROUTED1(AutofillHostMsg_DidFillAutofillFormData,
                     base::TimeTicks /* timestamp */)
 
+// Sent when a form receives a request to do interactive autocomplete.
+IPC_MESSAGE_ROUTED2(AutofillHostMsg_RequestAutocomplete,
+                    int /* id of this message */,
+                    FormData /* the form */)
+
 // Instructs the browser to remove the specified Autocomplete entry from the
 // database.
 IPC_MESSAGE_ROUTED2(AutofillHostMsg_RemoveAutocompleteEntry,