[Android] Add enhanced bookmark opt-in flag.

chrome/browser/bookmarks/enhanced_bookmarks_features.cc

 // Copyright 2013 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/bookmarks/enhanced_bookmarks_features.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/sha1.h"
 #include "base/strings/string_number_conversions.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
+#include "components/signin/core/browser/signin_manager.h"
 #include "components/sync_driver/pref_names.h"
 #include "components/variations/variations_associated_data.h"
 #include "extensions/common/features/feature.h"
 #include "extensions/common/features/feature_provider.h"
 
 namespace {
 
 const char kFieldTrialName[] = "EnhancedBookmarks";
 
 // Get extension id from Finch EnhancedBookmarks group parameters.
@@ skipping 97 matching lines @@
              BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT) {
     if (opt_out) {
       bookmarks_experiment_new_state =
           BOOKMARKS_EXPERIMENT_ENABLED_USER_OPT_OUT;
     } else {
       // User opted in again.
       bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_ENABLED;
     }
   }
 
+#if defined(OS_ANDROID)
+  bool opt_in = !opt_out
+      && CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
+          switches::kEnhancedBookmarksExperiment) == "1";
+  if (opt_in && bookmarks_experiment_new_state == BOOKMARKS_EXPERIMENT_NONE)
+    bookmarks_experiment_new_state = BOOKMARKS_EXPERIMENT_ENABLED;
+#endif
+
   UMA_HISTOGRAM_ENUMERATION("EnhancedBookmarks.SyncExperimentState",
                             bookmarks_experiment_new_state,
                             BOOKMARKS_EXPERIMENT_ENUM_SIZE);
   user_prefs->SetInteger(
       sync_driver::prefs::kEnhancedBookmarksExperimentEnabled,
       bookmarks_experiment_new_state);
   ForceFinchBookmarkExperimentIfNeeded(flags_storage,
                                        bookmarks_experiment_new_state);
 }
 
+void InitBookmarksExperimentState(Profile* profile) {
+  SigninManagerBase* signin = SigninManagerFactory::GetForProfile(profile);
+  bool is_signed_in = signin && !signin->IsAuthenticated();
+  UpdateBookmarksExperimentState(
+      profile->GetPrefs(),
+      g_browser_process->local_state(),
+      is_signed_in,
+      BOOKMARKS_EXPERIMENT_ENABLED_FROM_SYNC_UNKNOWN);
+}
+
 void ForceFinchBookmarkExperimentIfNeeded(
     PrefService* flags_storage,
     BookmarksExperimentState bookmarks_experiment_state) {
   if (!flags_storage)
     return;
   ListPrefUpdate update(flags_storage, prefs::kEnabledLabsExperiments);
   base::ListValue* experiments_list = update.Get();
   if (!experiments_list)
     return;
   size_t index;
@@ skipping 66 matching lines @@
   if (CommandLine::ForCurrentProcess()->
       HasSwitch(switches::kEnableSyncArticles)) {
     return true;
   }
   if (variations::GetVariationParamValue(
           kFieldTrialName, "enable-sync-articles") == "1")
     return true;
 
   return false;
 }