[Sync] Move PageTransitions enums to SyncEnums

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";
 
 option optimize_for = LITE_RUNTIME;
 option retain_unknown_fields = true;
 
 package sync_pb;
 
+import "sync_enums.proto";
+
 message SessionSpecifics {
   // Unique id for the client.
   optional string session_tag = 1;
   optional SessionHeader header = 2;
   optional SessionTab tab = 3;
   
   // The local tab id used by sync. Unique across all nodes for that client.
   optional int32 tab_node_id = 4 [default = -1];
 }
 
@@ skipping 69 matching lines @@
   // when we display it to the user.
   optional string virtual_url = 2;
   // The referring URL, which can be empty.
   optional string referrer = 3;
   // The title of the page.
   optional string title = 4;
   // Content state is an opaque blob created by WebKit that represents the
   // state of the page. This includes form entries and scroll position for each
   // frame.
   optional string state = 5;
-  // Types of transitions between pages.
-  enum PageTransition {
-    LINK = 0;
-    TYPED = 1;
-    AUTO_BOOKMARK = 2;
-    AUTO_SUBFRAME = 3;
-    MANUAL_SUBFRAME = 4;
-    GENERATED = 5;
-    START_PAGE = 6;
-    FORM_SUBMIT = 7;
-    RELOAD = 8;
-    KEYWORD = 9;
-    KEYWORD_GENERATED = 10;
-    CHAIN_START = 12;
-    CHAIN_END = 13;
-  }
-  // 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;
+  optional SyncEnums.PageTransition page_transition = 6 [default = TYPED];
+  optional SyncEnums.PageTransitionQualifier navigation_qualifier = 7;
   // The unique navigation id (within this client).
   optional int32 unique_id = 8;
   // Timestamp for when this navigation last occurred (in client time).
   // If the user goes back/foward in history the timestamp may refresh.
   optional int64 timestamp = 9;
 }