Add metrics to track Autofill "user happiness"

chrome/common/autofill_messages.h

 // Copyright (c) 2011 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 "content/common/webkit_param_traits.h"
 #include "ipc/ipc_message_macros.h"
@@ skipping 89 matching lines @@
 
 // Notification that initial layout has occurred and the following password
 // forms are visible on the page (e.g. not set to display:none.)
 IPC_MESSAGE_ROUTED1(AutofillHostMsg_PasswordFormsVisible,
                     std::vector<webkit_glue::PasswordForm> /* forms */)
 
 // Notification that a form has been submitted.  The user hit the button.
 IPC_MESSAGE_ROUTED1(AutofillHostMsg_FormSubmitted,
                     webkit_glue::FormData /* form */)
 
+// Notification that a form field's value has changed.
+IPC_MESSAGE_ROUTED2(AutofillHostMsg_TextFieldDidChange,
+                    webkit_glue::FormData /* the form */,
+                    webkit_glue::FormField /* the form field */)
+
 // Queries the browser for Autofill suggestions for a form input field.
 IPC_MESSAGE_ROUTED3(AutofillHostMsg_QueryFormFieldAutofill,
                     int /* id of this message */,
                     webkit_glue::FormData /* the form */,
                     webkit_glue::FormField /* the form field */)
 
 // Sent when the popup with Autofill suggestions for a form is shown.
-IPC_MESSAGE_ROUTED0(AutofillHostMsg_DidShowAutofillSuggestions)
+IPC_MESSAGE_ROUTED1(AutofillHostMsg_DidShowAutofillSuggestions,
+                    bool /* is this a new popup? */)
 
 // Instructs the browser to fill in the values for a form using Autofill
 // profile data.
 IPC_MESSAGE_ROUTED4(AutofillHostMsg_FillAutofillFormData,
                     int /* id of this message */,
                     webkit_glue::FormData /* the form  */,
                     webkit_glue::FormField /* the form field  */,
                     int /* profile unique ID */)
 
-// Sent when a form is previewed or filled with Autofill suggestions.
+// 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_ROUTED0(AutofillHostMsg_DidFillAutofillFormData)
 
 // 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)