[Sync] - In about:sync page display if the first sync after restart has taken place or not.

chrome/browser/sync/sync_ui_util.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/sync/sync_ui_util.h"
 
 #include "base/i18n/number_formatting.h"
 #include "base/i18n/time_formatting.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 493 matching lines @@
     strings->SetString("summary", "SYNC DISABLED");
   } else {
     sync_api::SyncManager::Status full_status(
         service->QueryDetailedSyncStatus());
 
     strings->SetString("service_url", service->sync_service_url().spec());
     strings->SetString("summary",
                        ProfileSyncService::BuildSyncStatusSummaryText(
                        full_status.summary));
 
+    if (full_status.summary == sync_api::SyncManager::Status::UNINITIALIZED) {
+      strings->Set("summary_explanation_needed",
+                   new base::FundamentalValue(true));
+      std::string message = "A sync has not happened since restart. ";
+      message += "The following values are speculative.";
+      strings->SetString("summary_explanation_message", message);
+    }
+
     strings->SetString("version", GetVersionString());
     strings->Set("authenticated",
                  new base::FundamentalValue(full_status.authenticated));
     strings->SetString("auth_problem",
                        sync_ui_util::MakeSyncAuthErrorText(
                        service->GetAuthError().state()));
 
     strings->SetString("time_since_sync", service->GetLastSyncedTimeString());
 
     ListValue* details = new ListValue();
@@ skipping 173 matching lines @@
     }
   } else {
     version_modifier = " " + version_modifier;
   }
   return chrome_version.Name() + " " + chrome_version.OSType() + " " +
       chrome_version.Version() + " (" + chrome_version.LastChange() + ")" +
       version_modifier;
 }
 
 }  // namespace sync_ui_util