Get rid of --start-renderers-manually since it's been broken for a long time ...

chrome/common/pref_names.h

 // Copyright (c) 2006-2008 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.
 
 // Constants for the names of various preferences, for easier changing.
 
 #ifndef CHROME_COMMON_PREF_NAMES_H_
 #define CHROME_COMMON_PREF_NAMES_H_
 
 namespace prefs {
@@ skipping 112 matching lines @@
 extern const wchar_t kStabilityPluginInstances[];
 extern const wchar_t kStabilityPluginCrashes[];
 
 extern const wchar_t kUninstallMetricsPageLoadCount[];
 extern const wchar_t kUninstallLaunchCount[];
 
 extern const wchar_t kUninstallMetricsUptimeSec[];
 extern const wchar_t kUninstallLastLaunchTimeSec[];
 extern const wchar_t kUninstallLastObservedRunTimeSec[];
 
-extern const wchar_t kStartRenderersManually[];
 extern const wchar_t kBrowserWindowPlacement[];
 extern const wchar_t kTaskManagerWindowPlacement[];
 extern const wchar_t kPageInfoWindowPlacement[];
 extern const wchar_t kMemoryCacheSize[];
 
 extern const wchar_t kDownloadDefaultDirectory[];
 extern const wchar_t kDownloadExtensionsToOpen[];
 extern const wchar_t kDownloadDirUpgraded[];
 
 extern const wchar_t kSaveFileDefaultDirectory[];
@@ skipping 26 matching lines @@
 extern const wchar_t kNumBookmarksInOtherBookmarkFolder[];
 extern const wchar_t kNumFoldersInOtherBookmarkFolder[];
 
 extern const wchar_t kNumKeywords[];
 
 extern const wchar_t kEnableExtensions[];
 extern const wchar_t kEnableUserScripts[];
 }
 
 #endif  // CHROME_COMMON_PREF_NAMES_H_