Delete some unused code found by -Wunused-function

chrome/browser/sessions/base_session_service.cc

 // Copyright (c) 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.
 
 #include "chrome/browser/sessions/base_session_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/pickle.h"
 #include "base/stl_util.h"
@@ skipping 34 matching lines @@
                          const std::string& str) {
   int num_bytes = str.size() * sizeof(char);
   if (*bytes_written + num_bytes < max_bytes) {
     *bytes_written += num_bytes;
     pickle.WriteString(str);
   } else {
     pickle.WriteString(std::string());
   }
 }
 
-// string16 version of WriteStringToPickle.
-void WriteString16ToPickle(Pickle& pickle, int* bytes_written, int max_bytes,
-                           const string16& str) {
-  int num_bytes = str.size() * sizeof(char16);
-  if (*bytes_written + num_bytes < max_bytes) {
-    *bytes_written += num_bytes;
-    pickle.WriteString16(str);
-  } else {
-    pickle.WriteString16(string16());
-  }
-}
-
 }  // namespace
 
 // Delay between when a command is received, and when we save it to the
 // backend.
 static const int kSaveDelayMS = 2500;
 
 // static
 const int BaseSessionService::max_persist_navigation_count = 6;
 
 BaseSessionService::BaseSessionService(SessionType type,
@@ skipping 219 matching lines @@
     // has gone away (around shutdown time) or if we're running as
     // part of a unit test that does not set profile_.
     task.Run();
     return true;
   }
 }
 
 bool BaseSessionService::RunningInProduction() const {
   return profile_ && BrowserThread::IsMessageLoopValid(BrowserThread::FILE);
 }