Adding show profile switcher field trial.

chrome/browser/chrome_browser_field_trials.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_
 #define CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/gtest_prod_util.h"
@@ skipping 37 matching lines @@
 
   // Disables the new tab field trial if not running in desktop mode.
   void DisableNewTabFieldTrialIfNecesssary();
 
   // Sets up the InfiniteCache field trial.
   void SetUpInfiniteCacheFieldTrial();
 
   // Sets up field trials for doing Cache Sensitivity Analysis.
   void SetUpCacheSensitivityAnalysisFieldTrial();
 
+  // Disables the show profile switcher field trial if multi-profiles is not
+  // enabled.
+  void DisableShowProfileSwitcherTrialIfNecessary();
+
   // A field trial to determine the impact of using non-blocking reads for
   // TCP sockets on Windows instead of overlapped I/O.
   void WindowsOverlappedTCPReadsFieldTrial();
 
   // Instantiates dynamic trials by querying their state, to ensure they get
   // reported as used.
   void InstantiateDynamicTrials();
 
   const CommandLine& parsed_command_line_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeBrowserFieldTrials);
 };
 
 #endif  // CHROME_BROWSER_CHROME_BROWSER_FIELD_TRIALS_H_