Add cache_guid accessor to UserShare

chrome/browser/sync/glue/session_model_associator.cc

Index: chrome/browser/sync/glue/session_model_associator.cc
diff --git a/chrome/browser/sync/glue/session_model_associator.cc b/chrome/browser/sync/glue/session_model_associator.cc
index 739e1379a11209b602443c8b1c1714fa43276ca3..5c6ea1502b96a67085bce3c83879b3eabafbcd7e 100644
--- a/chrome/browser/sync/glue/session_model_associator.cc
+++ b/chrome/browser/sync/glue/session_model_associator.cc
@@ -36,12 +36,10 @@
 #include "sync/internal_api/public/base/model_type_invalidation_map.h"
 #include "sync/internal_api/public/read_node.h"
 #include "sync/internal_api/public/read_transaction.h"
+#include "sync/internal_api/public/user_share.h"
 #include "sync/internal_api/public/write_node.h"
 #include "sync/internal_api/public/write_transaction.h"
 #include "sync/protocol/session_specifics.pb.h"
-#include "sync/syncable/directory.h"
-#include "sync/syncable/read_transaction.h"
-#include "sync/syncable/write_transaction.h"
 #include "sync/util/get_session_name.h"
 #include "ui/gfx/favicon_size.h"
 #if defined(OS_LINUX)
@@ -602,7 +600,7 @@ syncer::SyncError SessionModelAssociator::AssociateModels() {
 
     // Make sure we have a machine tag.
     if (current_machine_tag_.empty()) {
-      InitializeCurrentMachineTag(&trans);
+      InitializeCurrentMachineTag(sync_service_->GetUserShare());
       // The session name is retrieved asynchronously so it might not come back
       // for the writing of the session. However, we write to the session often
       // enough (on every navigation) that we'll pick it up quickly.
@@ -677,7 +675,7 @@ syncer::SyncError SessionModelAssociator::DisassociateModels() {
 }
 
 void SessionModelAssociator::InitializeCurrentMachineTag(
-    syncer::WriteTransaction* trans) {
+    syncer::UserShare* share) {
   DCHECK(CalledOnValidThread());
   DCHECK(current_machine_tag_.empty());
   std::string persisted_guid;
@@ -688,8 +686,6 @@ void SessionModelAssociator::InitializeCurrentMachineTag(
     DVLOG(1) << "Restoring persisted session sync guid: "
              << persisted_guid;
   } else {
-    syncer::syncable::Directory* dir =
-        trans->GetWrappedWriteTrans()->directory();
     current_machine_tag_ = "session_sync";
 #if defined(OS_ANDROID)
     const std::string android_id = syncer::internal::GetAndroidId();
@@ -697,9 +693,9 @@ void SessionModelAssociator::InitializeCurrentMachineTag(
     // are supposed to be fixed as of Gingerbread, but if it happens we fall
     // back to use the same GUID generation as on other platforms.
     current_machine_tag_.append(android_id.empty() ?
-                                    dir->cache_guid() : android_id);
+                                    share->cache_guid() : android_id);
 #else
-    current_machine_tag_.append(dir->cache_guid());
+    current_machine_tag_.append(share->cache_guid());
 #endif
     DVLOG(1) << "Creating session sync guid: " << current_machine_tag_;
     if (pref_service_)