Fix compiling of sync on linux.

chrome/browser/sync/util/query_helpers.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.
 //
 // Typesafe composition of SQL query strings.
 
 #ifndef CHROME_BROWSER_SYNC_UTIL_QUERY_HELPERS_H_
 #define CHROME_BROWSER_SYNC_UTIL_QUERY_HELPERS_H_
 
 #include <limits>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "chrome/browser/sync/util/sync_types.h"
 #include "third_party/sqlite/preprocessed/sqlite3.h"
 
-// Sometimes threads contend on the DB lock itself, especially when one thread
-// is calling SaveChanges.  In the worst case scenario, the user can put his
-// laptop to sleep during db contention, and wake up the laptop days later, so
-// infinity seems like the best choice here.
-const int kDirectoryBackingStoreBusyTimeoutMs = std::numeric_limits<int>::max();
-
 enum SqliteNullType {
   SQLITE_NULL_VALUE
 };
 
 int SqliteOpen(PathString filename, sqlite3** ppDb);
 
 sqlite3_stmt* PrepareQuery(sqlite3* dbhandle, const char* query);
 #if !PATHSTRING_IS_STD_STRING
 sqlite3_stmt* BindArg(sqlite3_stmt*, const PathString&, int index);
 sqlite3_stmt* BindArg(sqlite3_stmt*, const PathChar*, int index);
@@ skipping 654 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ScopedStatementResetter);
 };
 
 // Useful for encoding any sequence of bytes into a string that can be used in
 // a table name. Kind of like hex encoding, except that A is zero and P is 15.
 std::string APEncode(const std::string& in);
 std::string APDecode(const std::string& in);
 
 #endif  // CHROME_BROWSER_SYNC_UTIL_QUERY_HELPERS_H_