Make it clear what last_sync_timestamp actually tracks. Update

chrome/browser/sync/syncable/syncable.h

 // 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.
 
 #ifndef CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_H_
 #define CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_H_
 
 #include <algorithm>
 #include <bitset>
 #include <iosfwd>
@@ skipping 640 matching lines @@
   friend class WriteTransaction;
   friend class SyncableDirectoryTest;
   FRIEND_TEST(SyncableDirectoryTest, TakeSnapshotGetsAllDirtyHandlesTest);
   FRIEND_TEST(SyncableDirectoryTest, TakeSnapshotGetsOnlyDirtyHandlesTest);
 
  public:
   // Various data that the Directory::Kernel we are backing (persisting data
   // for) needs saved across runs of the application.
   struct PersistedKernelInfo {
     // Last sync timestamp fetched from the server.
-    int64 last_sync_timestamp;
+    int64 last_download_timestamp;
     // true iff we ever reached the end of the changelog.
     bool initial_sync_ended;
     // The store birthday we were given by the server. Contents are opaque to
     // the client.
     std::string store_birthday;
     // The next local ID that has not been used with this cache-GUID.
     int64 next_id;
-    PersistedKernelInfo() : last_sync_timestamp(0),
+    PersistedKernelInfo() : last_download_timestamp(0),
         initial_sync_ended(false),
         next_id(0) {
     }
   };
 
   // What the Directory needs on initialization to create itself and its Kernel.
   // Filled by DirectoryBackingStore::Load.
   struct KernelLoadInfo {
     PersistedKernelInfo kernel_info;
     std::string cache_guid;  // Created on first initialization, never changes.
@@ skipping 33 matching lines @@
   // Always returns a negative id.  Positive client ids are generated
   // by the server only.
   Id NextId();
 
   const FilePath& file_path() const { return kernel_->db_path; }
   bool good() const { return NULL != store_; }
 
   // The sync timestamp is an index into the list of changes for an account.
   // It doesn't actually map to any time scale, it's name is an historical
   // anomaly.
-  int64 last_sync_timestamp() const;
-  void set_last_sync_timestamp(int64 timestamp);
+  int64 last_download_timestamp() const;
+  void set_last_download_timestamp(int64 timestamp);
 
   bool initial_sync_ended() const;
   void set_initial_sync_ended(bool value);
 
   const std::string& name() const { return kernel_->name; }
 
   // (Account) Store birthday is opaque to the client,
   // so we keep it in the format it is in the proto buffer
   // in case we switch to a binary birthday later.
   std::string store_birthday() const;
@@ skipping 394 matching lines @@
 void ZeroFields(EntryKernel* entry, int first_field);
 
 }  // namespace syncable
 
 std::ostream& operator <<(std::ostream&, const syncable::Blob&);
 
 browser_sync::FastDump& operator <<
   (browser_sync::FastDump&, const syncable::Blob&);
 
 #endif  // CHROME_BROWSER_SYNC_SYNCABLE_SYNCABLE_H_