Add Phone/Tablet device types for syncing session from Android.

sync/protocol/session_specifics.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.
 //
 // Sync protocol datatype extension for sessions.
 
 // Update proto_value_conversions{.h,.cc,_unittest.cc} if you change
 // any fields in this file.
 
 syntax = "proto2";
@@ skipping 15 matching lines @@
   repeated SessionWindow window = 2;
   // A non-unique but human-readable name to describe this client.
   optional string client_name = 3;
   // The type of device.
   enum DeviceType {
     TYPE_WIN = 1;
     TYPE_MAC = 2;
     TYPE_LINUX = 3;
     TYPE_CROS = 4;
     TYPE_OTHER = 5;
+    TYPE_PHONE = 6;
+    TYPE_TABLET = 7;
   }
   optional DeviceType device_type = 4;
 }
 message SessionWindow {
   // Unique (to the owner) id for this window.
   optional int32 window_id = 1;
   // Index of the selected tab in tabs; -1 if no tab is selected.
   optional int32 selected_tab_index = 2 [default = -1];
   // Type of the browser. Currently we only store browsers of type
   // TYPE_TABBED and TYPE_POPUP.
@@ skipping 56 matching lines @@
   }
   // These qualifiers further define the transition.
   enum PageTransitionQualifier {
     CLIENT_REDIRECT = 1;
     SERVER_REDIRECT = 2;
   }
   optional PageTransition page_transition = 6 [default = TYPED];
   optional PageTransitionQualifier navigation_qualifier = 7;
 }