Linux Aura: Use system title bar is now set by preference, not flag.

chrome/browser/about_flags.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/about_flags.h"
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
@@ skipping 1935 matching lines @@
     SINGLE_VALUE_TYPE(switches::kEnableSavePasswordBubble)
   },
 #endif
   {
     "embed-flash-fullscreen",
     IDS_FLAGS_EMBED_FLASH_FULLSCREEN_NAME,
     IDS_FLAGS_EMBED_FLASH_FULLSCREEN_DESCRIPTION,
     kOsDesktop,
     SINGLE_VALUE_TYPE(switches::kEmbedFlashFullscreen)
   },
-#if defined(USE_AURA)
-  {
-    "use-system-title-bar",
-    IDS_FLAGS_USE_SYSTEM_TITLE_BAR,

[msw, 2014/02/06 00:50:27]

You should remove these two string resources from
chrome/app/generated_resources.grd as well.

[Matt Giuca, 2014/02/11 04:57:43]

Done.

-    IDS_FLAGS_USE_SYSTEM_TITLE_BAR_DESCRIPTION,
-    kOsLinux,
-    SINGLE_VALUE_TYPE(switches::kUseSystemTitleBar)
-  },
-#endif
 #if defined(USE_AURA) || defined(OS_WIN)
   {
     "enable-permissions-bubbles",
     IDS_FLAGS_ENABLE_PERMISSIONS_BUBBLES_NAME,
     IDS_FLAGS_ENABLE_PERMISSIONS_BUBBLES_DESCRIPTION,
     kOsCrOS | kOsWin,
     SINGLE_VALUE_TYPE(switches::kEnablePermissionsBubbles)
   },
 #endif
   {
@@ skipping 514 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags