Added new Autofil API v1 protos.

These protos will be used to interface with the new Autofill API. We don't make any use of the protos in this CL.

Change-Id: I2353c0f183501748556cd3702f6fc625c43adb50
Reviewed-on: https://chromium-review.googlesource.com/c/1324197Reviewed-by: Mathieu Perreault <mathp@chromium.org>
Reviewed-by: Roger McFarlane <rogerm@chromium.org>
Commit-Queue: Vincent Boisselle <vincb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607646}

components/autofill/core/browser/proto/BUILD.gn

@@ -6,6 +6,7 @@ import("//third_party/libprotobuf-mutator/fuzzable_proto_library.gni")
 
 fuzzable_proto_library("proto") {
   sources = [
+    "api_v1.proto",
     "autofill_sync.proto",
     "password_requirements.proto",
     "password_requirements_shard.proto",

components/autofill/core/browser/proto/api_v1.proto

+// Copyright 2018 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.
+
+// Data models to interface with Autofill API v1.
+
+syntax = "proto2";
+
+option optimize_for = LITE_RUNTIME;
+
+package autofill;
+
+import "password_requirements.proto";
+
+// Request to retrieve field suggestions from Autofill API for forms in a page
+// that can be used as a resource ID in a RESTful interface.
+message AutofillPageResourceQueryRequest {
+  // Serialized AutofillPageQueryRequest encoded in base64. We cannot use
+  // "bytes" because this is not supported by the API. The serialized_request is
+  // also a distinct signature that can be used for caching.
+  optional string serialized_request = 1;
+};
+
+// Request to retrieve field suggestions for multiple forms in a page. You can
+// see this as batched form requests.
+// Next ID: 3
+message AutofillPageQueryRequest {
+  // Next ID: 3
+  message Form {
+    // Next ID: 4
+    message Field {
+      // Signature made of the field |name| and |control_type|.
+      optional fixed32 signature = 1;
+      // Name of the field (e.g., "First Name").
+      optional string name = 2;
+      // Type of the control (e.g., "email").
+      optional string control_type = 3;
+    };
+    // Signature of the form that is made of:
+    //  - URL scheme (e.g., "http")
+    //  - URL domain page (e.g., "google.com")
+    //  - Form name (e.g., "Sign In")
+    //  - Concatenated field names (e.g., "First Name", "Last Name")
+    optional fixed64 signature = 1;
+    // Fields of the form for which we want suggestions.
+    repeated Field fields = 2;
+  };
+  // Version of the client. Do not use, deprecated.
+  optional string client_version = 1 [deprecated = true];
+  // Forms in the same page for which we want fields suggestions.
+  repeated Form forms = 2;
+};
+
+// Response containing field suggestions from Autofill API for
+// AutofillPageQueryRequest request. Form and fields are in the exact same order
+// as in the request that gave the response.
+// Next ID: 2
+message AutofillQueryResponse {
+  // Next ID: 2
+  message FormSuggestion {
+    // Next ID: 6
+    message FieldSuggestion {
+      // Prediction made on a field.
+      message FieldPrediction {
+        // The predicted field type.
+        optional fixed32 type = 1;
+      }
+      // Signature identifying the field that is the same as in the request.
+      optional fixed32 field_signature = 1;
+      // The predicted field type.
+      optional int32 primary_type_prediction = 2;
+      // Detailed list of all possible predictions (including
+      // |primary_type_prediction| as the first item).
+      repeated FieldPrediction predictions = 3;
+      // Whether the server-side classification believes that the field
+      // may be pre-filled with a placeholder in the value attribute.
+      optional bool may_use_prefilled_placeholder = 4;
+      // For fields of type NEW_PASSWORD and ACCOUNT_CREATION_PASSWORD, this may
+      // specify requirements for the generation of passwords.
+      optional .autofill.PasswordRequirementsSpec password_requirements = 5;
+    };
+    // Suggestions on the fields in the same form.
+    repeated FieldSuggestion field_suggestions = 1;
+  };
+  // Suggestions for forms in the same page.
+  repeated FormSuggestion form_suggestions = 1;
+};

components/autofill/core/browser/proto/server.proto

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Data models to interface with legacy Autofill API.
+
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
@@ -10,8 +12,8 @@ package autofill;
 
 import "password_requirements.proto";
 
-// The message is sent when a client needs to autofill forms on web pages and
-// asks the server about known field types.
+// Request to query field suggestions for forms in a page from legacy Autofill
+// API.
 // Next available id: 11
 message AutofillQueryContents {
   required string client_version = 1;
@@ -25,8 +27,9 @@ message AutofillQueryContents {
   }
 }
 
-// This message is the result of an Autofill query. It holds the field type
-// information.
+// Response from Autofill query on the legacy API that gives field suggestions
+// for forms of a page in a flattened representation. The fields are returned in
+// the exact same order as filled in the request.
 // Next available id: 10
 message AutofillQueryResponseContents {
   optional bool upload_required = 1 [deprecated = true];