Move PageTransition from //content/public/common to //ui/base

sync/protocol/sync_enums.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 for communication between sync client and server.
 
 // Update proto_value_conversions{.h,.cc,_unittest.cc} if you change
 // any fields in this file.
 
 syntax = "proto2";
@@ skipping 27 matching lines @@
     KEYSTORE_TOKEN_UPDATED = 11;  // A new keystore encryption token was
                                   // persisted.
     CONFIGURE_COMPLETE = 12;      // The datatype manager has finished an
                                   // at least partially successful
                                   // configuration and is once again syncing
                                   // with the server.
     BOOTSTRAP_TOKEN_UPDATED = 13;  // A new cryptographer bootstrap token was
                                    // generated.
   }
 
-  // See content/public/common/page_transition_types.h for detailed
-  // information on the values of PageTransition and
-  // PageTransitionRedirectType below.
+  // See ui/base/page_transition_types.h for detailed information on the
+  // values of PageTransition and PageTransitionRedirectType below.
 
   // Types of transitions between pages.
   enum PageTransition {
     LINK = 0;
     TYPED = 1;
     AUTO_BOOKMARK = 2;
     AUTO_SUBFRAME = 3;
     MANUAL_SUBFRAME = 4;
     GENERATED = 5;
     AUTO_TOPLEVEL = 6;
@@ skipping 93 matching lines @@
                            // user opted to sync a different set of datatypes.
     GU_TRIGGER = 12;  // The client is in 'normal' mode.  It may have several
                       // reasons for requesting an update.  See the per-type
                       // GetUpdateTriggers message for more details.
     RETRY = 13;  // A retry GU to pick up updates missed by last GU due to
                  // replication delay, missing hints, etc.
     PROGRAMMATIC = 14;     // A GU to programmatically enable/disable a
                            // datatype, often due to error handling.
   }
 }