[Sync] Add more info for invalid position check

sync/syncable/entry_kernel.h

 // Copyright 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.
 
 #ifndef SYNC_SYNCABLE_ENTRY_KERNEL_H_
 #define SYNC_SYNCABLE_ENTRY_KERNEL_H_
 
 #include <set>
 
 #include "base/time/time.h"
@@ skipping 106 matching lines @@
 
 enum StringField {
   // Name, will be truncated by server. Can be duplicated in a folder.
   NON_UNIQUE_NAME = STRING_FIELDS_BEGIN,
   // The server version of |NON_UNIQUE_NAME|.
   SERVER_NON_UNIQUE_NAME,
 
   // A tag string which identifies this node as a particular top-level
   // permanent object.  The tag can be thought of as a unique key that
   // identifies a singleton instance.
-  UNIQUE_SERVER_TAG,  // Tagged by the server
-  UNIQUE_CLIENT_TAG,  // Tagged by the client
+  UNIQUE_SERVER_TAG,    // Tagged by the server
+  UNIQUE_CLIENT_TAG,    // Tagged by the client
   UNIQUE_BOOKMARK_TAG,  // Client tags for bookmark items
   STRING_FIELDS_END,
 };
 
 enum {
   STRING_FIELDS_COUNT = STRING_FIELDS_END - STRING_FIELDS_BEGIN,
   PROTO_FIELDS_BEGIN = STRING_FIELDS_END
 };
 
 // From looking at the sqlite3 docs, it's not directly stated, but it
@@ skipping 45 matching lines @@
   // and was therefore in the middle of a commit operation.
   // Note: must only be set if SYNCING is true.
   DIRTY_SYNC,
   BIT_TEMPS_END,
 };
 
 enum {
   BIT_TEMPS_COUNT = BIT_TEMPS_END - BIT_TEMPS_BEGIN
 };
 
-
-
 struct SYNC_EXPORT_PRIVATE EntryKernel {
  private:
   std::string string_fields[STRING_FIELDS_COUNT];
   EntitySpecificsPtr specifics_fields[PROTO_FIELDS_COUNT];
   int64 int64_fields[INT64_FIELDS_COUNT];
   base::Time time_fields[TIME_FIELDS_COUNT];
   Id id_fields[ID_FIELDS_COUNT];
   UniquePosition unique_position_fields[UNIQUE_POSITION_FIELDS_COUNT];
   AttachmentMetadataPtr
       attachment_metadata_fields[ATTACHMENT_METADATA_FIELDS_COUNT];
   std::bitset<BIT_FIELDS_COUNT> bit_fields;
   std::bitset<BIT_TEMPS_COUNT> bit_temps;
 
+  friend std::ostream& operator<<(std::ostream& s, const EntryKernel& e);
+
  public:
   EntryKernel();
   ~EntryKernel();
 
   // Set the dirty bit, and optionally add this entry's metahandle to
   // a provided index on dirty bits in |dirty_index|. Parameter may be null,
   // and will result only in setting the dirty bit of this entry.
   inline void mark_dirty(syncable::MetahandleSet* dirty_index) {
     if (!dirty_ && dirty_index) {
       DCHECK_NE(0, ref(META_HANDLE));
@@ skipping 167 matching lines @@
 typedef Immutable<EntryKernelMutationMap> ImmutableEntryKernelMutationMap;
 
 // Caller owns the return value.
 base::DictionaryValue* EntryKernelMutationToValue(
     const EntryKernelMutation& mutation);
 
 // Caller owns the return value.
 base::ListValue* EntryKernelMutationMapToValue(
     const EntryKernelMutationMap& mutations);
 
+std::ostream& operator<<(std::ostream& os, const EntryKernel& entry_kernel);
+
 }  // namespace syncable
 }  // namespace syncer
 
 #endif // SYNC_SYNCABLE_ENTRY_KERNEL_H_