chromeos: Adds --mus flag

chrome/browser/flag_descriptions.cc

 // Copyright 2017 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/flag_descriptions.h"
 
 namespace flag_descriptions {
 
 //  Material Design version of chrome://bookmarks
 
@@ skipping 897 matching lines @@
 const char kReducedReferrerGranularityName[] =
     "Reduce default 'referer' header granularity.";
 
 const char kReducedReferrerGranularityDescription[] =
     "If a page hasn't set an explicit referrer policy, setting this flag "
     "will reduce the amount of information in the 'referer' header for "
     "cross-origin requests.";
 
 #if defined(OS_CHROMEOS)
 
-const char kUseMashName[] = "Mojo UI Service (mus).";
+const char kUseMusDescription[] = "Enable the Mojo UI service.";
 
-const char kUseMashDescription[] = "Enable mus, mash etc.";
+const char kUseMusName[] = "Mus";
+
+const char kEnableMashDescription[] =
+    "Mash (Chrome and ash in separate services)";

[James Cook, 2017/05/15 16:49:18]

How about:

Mash (UI, Chrome and ash in separate services)

Mus (UI in separate service, Chrome and ash in same service)

optionally: s/service/process/

I think we should emphasize that the point of these flags is the UI service
running out of process.

[sky, 2017/05/15 17:53:39]

Done.
I didn't change service to process as the important thing is they are separate
services. This may matter if we play with what processes the services actually
live in.

+
+const char kEnableMusDescription[] = "Mus (Chrome and ash in the same service)";
 
 const char kAllowTouchpadThreeFingerClickName[] = "Touchpad three-finger-click";
 
 const char kAllowTouchpadThreeFingerClickDescription[] =
     "Enables touchpad three-finger-click as middle button.";
 
 const char kAshEnableUnifiedDesktopName[] = "Unified desktop mode";
 
 const char kAshEnableUnifiedDesktopDescription[] =
     "Enable unified desktop mode which allows a window to span multiple "
@@ skipping 2225 matching lines @@
 
 #endif  // !defined(OS_ANDROID) && !defined(OS_IOS)
 
 #if defined(OS_MACOSX)
 extern const char kMacRTLName[] = "Enable RTL";
 extern const char kMacRTLDescription[] =
     "Mirrors the UI for RTL language users";
 #endif
 
 }  // namespace flag_descriptions