Add policy to use system default printer

chrome/browser/resources/print_preview/data/destination_store.js

Index: chrome/browser/resources/print_preview/data/destination_store.js
diff --git a/chrome/browser/resources/print_preview/data/destination_store.js b/chrome/browser/resources/print_preview/data/destination_store.js
index a52b6d034e2bac20e43daad7120ed99e98533161..c03919337c09132a5f4839b983d9cf9a841c4886 100644
--- a/chrome/browser/resources/print_preview/data/destination_store.js
+++ b/chrome/browser/resources/print_preview/data/destination_store.js
@@ -169,6 +169,15 @@ cr.define('print_preview', function() {
         print_preview.DestinationOrigin.CROS :
         print_preview.DestinationOrigin.LOCAL;
 
+    /**
+     * Whether to default to the system default printer instead of the most
+     * recent destination.
+     * @type {boolean}

[dpapad, 2017/06/19 17:43:37]

Nit: @private {boolean}

[rbpotter, 2017/06/19 23:10:49]

Done.

+     * @private
+     */
+    this.useSystemDefaultAsDefault_ =
+        loadTimeData.getBoolean('useSystemDefaultPrinter');
+
     this.addEventListeners_();
     this.reset_();
   }
@@ -601,11 +610,11 @@ cr.define('print_preview', function() {
               this.destinationMap_[this.getDestinationKey_(origin,
                                                            id, account)];
           if (candidate != null) {
-            if (!foundDestination)
+            if (!foundDestination && !this.useSystemDefaultAsDefault_)
               this.selectDestination(candidate);
             candidate.isRecent = true;
             foundDestination = true;
-          } else if (!foundDestination) {
+          } else if (!foundDestination && !this.useSystemDefaultAsDefault_) {
             foundDestination = this.fetchPreselectedDestination_(
                                     origin,
                                     id,
@@ -617,7 +626,7 @@ cr.define('print_preview', function() {
           }
         }
       }
-      if (foundDestination) return;
+      if (foundDestination && !this.useSystemDefaultAsDefault_) return;
 
       // Try the system default
       id = this.systemDefaultDestinationId_ || '';