Add policy to use system default printer

chrome/common/chrome_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 "chrome/common/chrome_switches.h"
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "build/build_config.h"
 #include "ppapi/features/features.h"
@@ skipping 821 matching lines @@
 // --unsafely-treat-insecure-origin-as-secure=http://a.test,http://b.test
 // --user-data-dir=/test/only/profile/dir
 const char kUnsafelyTreatInsecureOriginAsSecure[] =
     "unsafely-treat-insecure-origin-as-secure";
 
 // Pass the full https:// URL to PAC (Proxy Auto Config) scripts. As opposed to
 // the default behavior which strips path and query components before passing
 // to the PAC scripts.
 const char kUnsafePacUrl[] = "unsafe-pac-url";
 
+// Overrides the use of the most recent destination as the automatically

[Lei Zhang, 2017/06/15 18:26:16]

How about:

Uses the system default printer as the initially selected destination in print
preview, instead of the most recently used destination.

[rbpotter, 2017/06/16 02:21:46]

Done.

+// selected destination in the Print Preview UI and automatically selects the
+// OS default destination instead.
+const char kUseSystemDefaultPrinter[] = "use-system-default-printer";
+
 // A string used to override the default user agent with a custom one.
 const char kUserAgent[]                     = "user-agent";
 
 // Specifies the user data directory, which is where the browser will look for
 // all of its state.
 const char kUserDataDir[]                   = "user-data-dir";
 
 // Uses experimental simple cache backend if possible.
 const char kUseSimpleCacheBackend[]         = "use-simple-cache-backend";
 
@@ skipping 340 matching lines @@
 
 // -----------------------------------------------------------------------------
 // DO NOT ADD YOUR VERY NICE FLAGS TO THE BOTTOM OF THIS FILE.
 //
 // You were going to just dump your switches here, weren't you? Instead, please
 // put them in alphabetical order above, or in order inside the appropriate
 // ifdef at the bottom. The order should match the header.
 // -----------------------------------------------------------------------------
 
 }  // namespace switches