Clarify comment for --ppapi-startup-dialog.

content/public/common/content_switches.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 "content/public/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 486 matching lines @@
 
 // Runs PPAPI (Pepper) plugins out-of-process.
 const char kPpapiOutOfProcess[]             = "ppapi-out-of-process";
 
 // Like kPluginLauncher for PPAPI plugins.
 const char kPpapiPluginLauncher[]           = "ppapi-plugin-launcher";
 
 // Argument to the process type that indicates a PPAPI plugin process type.
 const char kPpapiPluginProcess[]            = "ppapi";
 
-// Causes the PPAPI sub process to display a dialog on launch.
+// Causes the PPAPI sub process to display a dialog on launch. Be sure to use
+// --no-sandbox as well or the sandbox won't allow the dialog to display.
 const char kPpapiStartupDialog[]            = "ppapi-startup-dialog";
 
 // Runs a single process for each site (i.e., group of pages from the same
 // registered domain) the user visits.  We default to using a renderer process
 // for each site instance (i.e., group of pages from the same registered
 // domain with script connections to each other).
 const char kProcessPerSite[]                = "process-per-site";
 
 // Runs each set of script-connected tabs (i.e., a BrowsingInstance) in its own
 // renderer process.  We default to using a renderer process for each
@@ skipping 180 matching lines @@
 // Sets the width and height above which a composited layer will get tiled.
 const char kMaxUntiledLayerWidth[]          = "max-untiled-layer-width";
 const char kMaxUntiledLayerHeight[]         = "max-untiled-layer-height";
 
 const char kEnableFixedPositionCreatesStackingContext[]
     = "enable-fixed-position-creates-stacking-context";
 const char kDisableFixedPositionCreatesStackingContext[]
     = "disable-fixed-position-creates-stacking-context";
 
 }  // namespace switches