Add method to invoke mobile only field trials. Add a field trial that controls rollout of data comp…

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 15 matching lines @@
                            WarmConnectionFieldTrial_WarmestSocket);
   FRIEND_TEST_ALL_PREFIXES(BrowserMainTest, WarmConnectionFieldTrial_Random);
   FRIEND_TEST_ALL_PREFIXES(BrowserMainTest, WarmConnectionFieldTrial_Invalid);
 
   // Sets up common desktop-only field trials.
   // Add an invocation of your field trial init function to this method, or to
   // SetupFieldTrials if it is for all platforms.
   // |local_state| is needed by some other methods called from within this one.
   void SetupDesktopFieldTrials(PrefService* local_state);
 
+  // Sets up mobile-only field trials.
+  // Add invocation of your field trial initialization code in this method.
+  void SetupMobileFieldTrials();

[SteveT, 2013/04/01 19:26:51]

Do we want to declare/define this at all on desktop platforms? The code doesn't
get used.

That is, should we be wrapping this and the definition and appropriate IFDEFs?

[vagababov, 2013/04/01 19:34:56]

Makes sense. Wrapped declarations and definitions in the ifdef guards as well.

+
   // This is not quite a field trial initialization, but it's an initialization
   // that depends on a field trial, so why not? :-)
   // |local_state| is needed to reset a local pref based on the chosen group.
   void SetupAppLauncherFieldTrial(PrefService* local_state);
 
   // A/B test for spdy when --use-spdy not set.
   void SpdyFieldTrial();
 
+  // Mobile compression rollout field trial.
+  void DataCompressionProxyFieldTrial();
+
   // A/B test for warmest socket vs. most recently used socket.
   void WarmConnectionFieldTrial();
 
   // Field trial to see what disabling DNS pre-resolution does to
   // latency of page loads.
   void PredictorFieldTrial();
 
   // A field trial to see what effects launching Chrome automatically on
   // computer startup has on retention and usage of Chrome.
   void AutoLaunchChromeFieldTrial();
@@ skipping 23 matching lines @@
   // 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_