sync: Add DeviceInfo protobuf and supporting code

chrome/browser/sync/glue/sync_backend_host.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 "build/build_config.h"
 
 #include "chrome/browser/sync/glue/sync_backend_host.h"
 
 #include <algorithm>
 #include <map>
@@ skipping 10 matching lines @@
 #include "base/timer.h"
 #include "base/tracked_objects.h"
 #include "base/utf_string_conversions.h"
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/token_service.h"
 #include "chrome/browser/sync/glue/bridged_invalidator.h"
 #include "chrome/browser/sync/glue/change_processor.h"
 #include "chrome/browser/sync/glue/chrome_encryptor.h"
 #include "chrome/browser/sync/glue/chrome_sync_notification_bridge.h"
+#include "chrome/browser/sync/glue/device_info.h"
 #include "chrome/browser/sync/glue/sync_backend_registrar.h"
 #include "chrome/browser/sync/invalidations/invalidator_storage.h"
 #include "chrome/browser/sync/sync_prefs.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/common/content_client.h"
 #include "google_apis/gaia/gaia_constants.h"
@@ skipping 308 matching lines @@
 }
 
 SyncBackendHost::~SyncBackendHost() {
   DCHECK(!core_ && !frontend_) << "Must call Shutdown before destructor.";
   DCHECK(!chrome_sync_notification_bridge_.get());
   DCHECK(!registrar_.get());
 }
 
 namespace {
 
-// Helper to construct a user agent string (ASCII) suitable for use by
-// the syncapi for any HTTP communication. This string is used by the sync
-// backend for classifying client types when calculating statistics.
-std::string MakeUserAgentForSyncApi() {
-  std::string user_agent;
-  user_agent = "Chrome ";
-#if defined(OS_WIN)
-  user_agent += "WIN ";
-#elif defined(OS_CHROMEOS)
-  user_agent += "CROS ";
-#elif defined(OS_ANDROID)
-  user_agent += "ANDROID ";
-#elif defined(OS_LINUX)
-  user_agent += "LINUX ";
-#elif defined(OS_FREEBSD)
-  user_agent += "FREEBSD ";
-#elif defined(OS_OPENBSD)
-  user_agent += "OPENBSD ";
-#elif defined(OS_MACOSX)
-  user_agent += "MAC ";
-#endif
-  chrome::VersionInfo version_info;
-  if (!version_info.is_valid()) {
-    DLOG(ERROR) << "Unable to create chrome::VersionInfo object";
-    return user_agent;
-  }
-
-  user_agent += version_info.Version();
-  user_agent += " (" + version_info.LastChange() + ")";
-  if (!version_info.IsOfficialBuild())
-    user_agent += "-devel";
-  return user_agent;
-}
-
 scoped_ptr<syncer::HttpPostProviderFactory> MakeHttpBridgeFactory(
     const scoped_refptr<net::URLRequestContextGetter>& getter) {
+  chrome::VersionInfo version_info;
   return scoped_ptr<syncer::HttpPostProviderFactory>(
-      new syncer::HttpBridgeFactory(getter, MakeUserAgentForSyncApi()));
+      new syncer::HttpBridgeFactory(
+          getter, DeviceInfo::MakeUserAgentForSyncApi(version_info)));
 }
 
 }  // namespace
 
 void SyncBackendHost::Initialize(
     SyncFrontend* frontend,
     const syncer::WeakHandle<syncer::JsEventHandler>& event_handler,
     const GURL& sync_service_url,
     const SyncCredentials& credentials,
     bool delete_sync_data_folder,
@@ skipping 1137 matching lines @@
     const syncer::ModelTypeSet failed_configuration_types) {
   HandleInitializationCompletedOnFrontendLoop(
       failed_configuration_types.Empty());
 }
 
 #undef SDVLOG
 
 #undef SLOG
 
 }  // namespace browser_sync