Restoring the chrome variatioons client, with a fix for browser_test failures caused by it.

chrome/browser/chrome_browser_main.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/chrome_browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 37 matching lines @@
 #include "chrome/browser/gpu_util.h"
 #include "chrome/browser/instant/instant_field_trial.h"
 #include "chrome/browser/jankometer.h"
 #include "chrome/browser/language_usage_metrics.h"
 #include "chrome/browser/metrics/histogram_synchronizer.h"
 #include "chrome/browser/metrics/field_trial_synchronizer.h"
 #include "chrome/browser/metrics/metrics_log.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/metrics/thread_watcher.h"
 #include "chrome/browser/metrics/tracking_synchronizer.h"
+#include "chrome/browser/metrics/variations_service.h"
 #include "chrome/browser/nacl_host/nacl_process_host.h"
 #include "chrome/browser/net/chrome_net_log.h"
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "chrome/browser/plugin_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/pref_value_store.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/prerender/prerender_field_trial.h"
@@ skipping 515 matching lines @@
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kForceFieldTrials)) {
     std::string persistent = command_line->GetSwitchValueASCII(
         switches::kForceFieldTrials);
     bool ret = base::FieldTrialList::CreateTrialsFromString(persistent);
     CHECK(ret) << "Invalid --" << switches::kForceFieldTrials <<
                   " list specified.";
   }
 #endif  // NDEBUG
 
+  VariationsService* variations_service =
+      browser_process_->variations_service();
+  variations_service->CreateTrialsFromSeed(browser_process_->local_state());
+
   SetupFieldTrials(metrics->recording_active(),
                    local_state_->IsManagedPreference(
                        prefs::kMaxConnectionsPerProxy));
 
   // Initialize FieldTrialSynchronizer system. This is a singleton and is used
   // for posting tasks via base::Bind. Its deleted when it goes out of scope.
   // Even though base::Bind does AddRef and Release, the object will not be
   // deleted after the Task is executed.
   field_trial_synchronizer_ = new FieldTrialSynchronizer();
 }
@@ skipping 1251 matching lines @@
         parameters().autorelease_pool->Recycle();
 #endif
 
       RecordPreReadExperimentTime("Startup.BrowserOpenTabs",
                                   base::TimeTicks::Now() - browser_open_start);
 
       // TODO(mad): Move this call in a proper place on CrOS.
       // http://crosbug.com/17687
 #if !defined(OS_CHROMEOS)
       // If we're running tests (ui_task is non-null), then we don't want to
-      // call FetchLanguageListFromTranslateServer
-      if (parameters().ui_task == NULL && translate_manager_ != NULL) {
-        translate_manager_->FetchLanguageListFromTranslateServer(
-            profile_->GetPrefs());
+      // call FetchLanguageListFromTranslateServer or
+      // StartFetchingVariationsSeed.
+      if (parameters().ui_task == NULL) {
+        // Request new variations seed information from server.
+        browser_process_->variations_service()->StartFetchingVariationsSeed();
+
+        if (translate_manager_ != NULL) {
+          translate_manager_->FetchLanguageListFromTranslateServer(
+              profile_->GetPrefs());
+        }
       }
 #endif
 
       run_message_loop_ = true;
     } else {
       run_message_loop_ = false;
     }
   browser_creator_.reset();
 
   PostBrowserStart();
@@ skipping 129 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }