Make it clear what last_sync_timestamp actually tracks. Update

chrome/browser/sync/syncable/syncable.cc

 // Copyright (c) 2009 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.
 
 #include "chrome/browser/sync/syncable/syncable.h"
 
 #include "build/build_config.h"
 
 #include <sys/stat.h>
 #if defined(OS_POSIX)
@@ skipping 612 matching lines @@
   for (ExtendedAttributes::const_iterator i = snapshot.dirty_xattrs.begin();
        i != snapshot.dirty_xattrs.end(); ++i) {
     ExtendedAttributeKey key(i->first.metahandle, i->first.key);
     ExtendedAttributes::iterator found =
         kernel_->extended_attributes->find(key);
     if (found != kernel_->extended_attributes->end())
       found->second.dirty = true;
   }
 }
 
-int64 Directory::last_sync_timestamp() const {
+int64 Directory::last_download_timestamp() const {
   ScopedKernelLock lock(this);
-  return kernel_->persisted_info.last_sync_timestamp;
+  return kernel_->persisted_info.last_download_timestamp;
 }
 
-void Directory::set_last_sync_timestamp(int64 timestamp) {
+void Directory::set_last_download_timestamp(int64 timestamp) {
   ScopedKernelLock lock(this);
-  if (kernel_->persisted_info.last_sync_timestamp == timestamp)
+  if (kernel_->persisted_info.last_download_timestamp == timestamp)
     return;
-  kernel_->persisted_info.last_sync_timestamp = timestamp;
+  kernel_->persisted_info.last_download_timestamp = timestamp;
   kernel_->info_status = KERNEL_SHARE_INFO_DIRTY;
 }
 
 bool Directory::initial_sync_ended() const {
   ScopedKernelLock lock(this);
   return kernel_->persisted_info.initial_sync_ended;
 }
 
 void Directory::set_initial_sync_ended(bool x) {
   ScopedKernelLock lock(this);
@@ skipping 916 matching lines @@
   return s << std::dec;
 }
 
 FastDump& operator<<(FastDump& dump, const syncable::Blob& blob) {
   if (blob.empty())
     return dump;
   string buffer(HexEncode(&blob[0], blob.size()));
   dump.out_->sputn(buffer.c_str(), buffer.size());
   return dump;
 }