Add policy to use system default printer

chrome/browser/policy/configuration_policy_handler_list_factory.cc

Index: chrome/browser/policy/configuration_policy_handler_list_factory.cc
diff --git a/chrome/browser/policy/configuration_policy_handler_list_factory.cc b/chrome/browser/policy/configuration_policy_handler_list_factory.cc
index ec293b683249d5db76d12542823ce3a34d5bcc63..cda64f1962da68d14cb9157a75e2019e0875bda1 100644
--- a/chrome/browser/policy/configuration_policy_handler_list_factory.cc
+++ b/chrome/browser/policy/configuration_policy_handler_list_factory.cc
@@ -618,6 +618,12 @@ const PolicyToPreferenceMapEntry kSimplePolicyMap[] = {
     base::Value::Type::BOOLEAN },
 #endif  // !defined(OS_CHROMEOS) && !defined(OS_ANDROID)
 
+#if !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)

[Lei Zhang, 2017/06/19 23:41:40]

I'm not 100% sure, but I thought there's no iOS code in chrome/ ?

+eugenebut to give a definitive answer.

[Eugene But (OOO till 7-30), 2017/06/20 00:53:57]

I confirm that there is no iOS code in chrome/

[Lei Zhang, 2017/06/20 00:56:25]

Thanks! Should we in a separate CL, clear out the OS_IOS usage in chrome/, and
maybe add a presubmit check?

[rbpotter, 2017/06/20 02:58:25]

Removed all newly added IOS checks.

+  { key::kPrintPreviewUseSystemDefaultPrinter,
+    prefs::kPrintPreviewUseSystemDefaultPrinter,
+    base::Value::Type::BOOLEAN },
+#endif  // !defined(OS_CHROMEOS) && !defined(OS_ANDROID) && !defined(OS_IOS)
+
   { key::kForceBrowserSignin,
     prefs::kForceBrowserSignin,
     base::Value::Type::BOOLEAN },