Added cloud policy registration and fetch types for iOS.

chrome/browser/policy/proto/cloud/device_management_backend.proto

 // 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package enterprise_management;
 
 // Request from device to server to register device.
 message DeviceRegisterRequest {
   // Reregister device without erasing server state.  It can be used
   // to refresh dmtoken etc.  Client MUST set this value to true if it
   // reuses an existing device id.
   optional bool reregister = 1;
 
   // Device register type.  This field does not exist for TT release.
   // When a client requests for policies, server should verify the
   // client has been registered properly.  For example, a client must
   // register with type DEVICE in order to retrieve device policies.
   enum Type {
-    TT   = 0;       // Register for TT release.
-    USER = 1;       // Register for Chrome OS user polices.
-    DEVICE = 2;     // Register for device policies.
-    BROWSER = 3;    // Register for Chrome user policies.
+    TT   = 0;             // Register for TT release.
+    USER = 1;             // Register for Chrome OS user polices.
+    DEVICE = 2;           // Register for device policies.
+    BROWSER = 3;          // Register for Chrome user policies.
     ANDROID_BROWSER = 4;  // Register for Android Chrome browser user policies.
+    IOS_BROWSER = 5;      // Register for iOS Chrome browser user policies.
   }
   // NOTE: we also use this field to detect client version.  If this
   // field is missing, then the request comes from TT.  We will remove
   // Chrome OS TT support once it is over.
   optional Type type = 2 [default = TT];
 
   // Machine hardware id, such as serial number.
   // This field is required if register type == DEVICE.
   optional string machine_id = 3;
 
@@ skipping 90 matching lines @@
   // This is the policy type, which maps to D3 policy type internally.
   // By convention, we use "/" as separator to create policy namespace.
   // The policy type names are case insensitive.
   //
   // Possible values for Chrome OS are:
   //   google/chromeos/device => ChromeDeviceSettingsProto
   //   google/chromeos/user => ChromeSettingsProto
   //   google/chromeos/publicaccount => ChromeSettingsProto
   //   google/chrome/extension => ExternalPolicyData
   //   google/android/user => ChromeSettingsProto
+  //   google/ios/user => ChromeSettingsProto
   optional string policy_type = 1;
 
   // This is the last policy timestamp that client received from server.
   optional int64 timestamp = 2;
 
   // Tell server what kind of security signature is required.
   enum SignatureType {
     NONE = 0;
     SHA1_RSA = 1;
   }
@@ skipping 464 matching lines @@
 
   // Auto-enrollment detection response.
   optional DeviceAutoEnrollmentResponse auto_enrollment_response = 8;
 
   // EMCert upload response.
   optional DeviceCertUploadResponse cert_upload_response = 9;
 
   // Response to OAuth2 authorization code request.
   optional DeviceServiceApiAccessResponse service_api_access_response = 10;
 }