Send all field trials from the browser.

chrome/browser/renderer_host/chrome_render_message_filter.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_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 100 matching lines @@
 #endif
   void OnAllowIndexedDB(int render_frame_id,
                         const GURL& origin_url,
                         const GURL& top_origin_url,
                         const base::string16& name,
                         bool* allowed);
 #if defined(ENABLE_PLUGINS)
   void OnIsCrashReportingEnabled(bool* enabled);
 #endif
 
+  void OnFieldTrialActivated(const std::string& trial_name,

[Alexei Svitkine (slow), 2014/11/05 22:50:53]

Nit: Maybe add a comment.

[Georges Khalil, 2014/11/06 18:36:28]

Done.

+                             const std::string& group_name);
+
   const int render_process_id_;
 
   // The Profile associated with our renderer process.  This should only be
   // accessed on the UI thread!
   Profile* profile_;
   // The Predictor for the associated Profile. It is stored so that it can be
   // used on the IO thread.
   chrome_browser_net::Predictor* predictor_;
 
   // Used to look up permissions at database creation time.
   scoped_refptr<CookieSettings> cookie_settings_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeRenderMessageFilter);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_CHROME_RENDER_MESSAGE_FILTER_H_