[Autofill] Migrate ContentAutofillDriver<-->AutofillAgent IPCs to mojo.

components/autofill/content/public/interfaces/autofill_agent.mojom

 // Copyright 2016 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.
 
 module autofill.mojom;
 
+import "components/autofill/content/public/interfaces/autofill_types.mojom";
+
 interface AutofillAgent {

[dcheng, 2016/07/12 14:22:12]

Please comment where this interface lives (in the renderers, presumably)

[leonhsl(Using Gerrit), 2016/07/13 03:48:30]

Done.

   // Tells the render frame that a user gesture was observed
   // somewhere in the tab (including in a different frame).
   FirstUserGestureObservedInTab();
+
+  // Instructs the renderer to fill the active form with the given form data.
+  FillForm(int32 id, FormData form);

[dcheng, 2016/07/12 14:22:12]

Nit: document what |id| is (I guess it's a general autofill concept?)

[leonhsl(Using Gerrit), 2016/07/13 03:48:30]

Done. Yes it's a autofill concept.

+
+  // Instructs the renderer to preview the active form with the given form data.
+  PreviewForm(int32 id, FormData form);
+
+  // Sends the heuristic and server field type predictions to the renderer.
+  FieldTypePredictionsAvailable(array<FormDataPredictions> forms);
+
+  // Clears the currently displayed Autofill results.
+  ClearForm();
+
+  // Tells the renderer that the Autofill previewed form should be cleared.
+  ClearPreviewedForm();
+
+  // Sets the currently selected node's value.
+  FillFieldWithValue(string value);
+
+  // Sets the suggested value for the currently previewed node.
+  PreviewFieldWithValue(string value);
+
+  // Sets the currently selected node's value to be the given data list value.
+  AcceptDataListSuggestion(string value);
+
+  // Tells the renderer to fill the username and password with with given
+  // values.
+  FillPasswordSuggestion(string username, string password);
+
+  // Tells the renderer to preview the username and password with the given
+  // values.
+  PreviewPasswordSuggestion(string username, string password);
+
+  // Sent when a password form is initially detected and suggestions should be
+  // shown. Used by the fill-on-select experiment.
+  ShowInitialPasswordAccountSuggestions(int32 key, PasswordFormFillData form_data);

[dcheng, 2016/07/12 14:22:12]

Ditto: please comment what |key| is.

[leonhsl(Using Gerrit), 2016/07/13 03:48:30]

Done.

 };