Extract ChromeBrowserFieldTrials out of ChromeBrowserMainParts.

chrome/browser/browser_trial.h

Index: chrome/browser/browser_trial.h
===================================================================
--- chrome/browser/browser_trial.h	(revision 148899)
+++ chrome/browser/browser_trial.h	(working copy)
@@ -1,25 +0,0 @@
-// Copyright (c) 2006-2008 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.
-
-// BrowserTrial contains methods specific to field trials (using FieldTrial
-// functionality) for browser tests.
-
-#ifndef CHROME_BROWSER_BROWSER_TRIAL_H_
-#define CHROME_BROWSER_BROWSER_TRIAL_H_
-
-#include "base/basictypes.h"
-
-// Currently we use this as a name space, to hold static shared constants which
-// define current and past trials.
-class BrowserTrial {
- public:
-
-  // The following is a sample line for what should be listed in this file.
-  // static const wchar_t* kPruningAlgorithmFieldTrial;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BrowserTrial);
-};
-
-#endif  // CHROME_BROWSER_BROWSER_TRIAL_H_