Define Print Preview default printer selection policy

chrome/test/data/webui/print_preview.js

Index: chrome/test/data/webui/print_preview.js
diff --git a/chrome/test/data/webui/print_preview.js b/chrome/test/data/webui/print_preview.js
index b4f8dacae15e839810f5130c51c7e381d55c7201..2ef9260e87b7a131424bbc96a07c50e7e737dd15 100644
--- a/chrome/test/data/webui/print_preview.js
+++ b/chrome/test/data/webui/print_preview.js
@@ -70,6 +70,7 @@ PrintPreviewWebUITest.prototype = {
         startGetInitialSettings: function() {},
         startGetLocalDestinations: function() {},
         startGetPrivetDestinations: function() {},
+        startGetExtensionDestinations: function() {},
         startGetLocalDestinationCapabilities: function(destinationId) {}
       };
       var oldNativeLayerEventType = print_preview.NativeLayer.EventType;
@@ -180,7 +181,7 @@ PrintPreviewWebUITest.prototype = {
       false /*selectionOnly*/,
       'FooDevice' /*systemDefaultDestinationId*/,
       null /*serializedAppStateStr*/,
-      false /*documentHasSelection*/);
+      null /*serializedDefaultDestinationSelectionRulesStr*/);
     this.localDestinationInfos_ = [
       { printerName: 'FooName', deviceName: 'FooDevice' },
       { printerName: 'BarName', deviceName: 'BarDevice' }
@@ -338,6 +339,20 @@ TEST_F('PrintPreviewWebUITest', 'TestPrintPreviewRestoreLocalDestination',
   testDone();
 });
 
+TEST_F('PrintPreviewWebUITest',
+    'TestPrintPreviewDefaultDestinationSelectionRules', function() {
+  // It also makes sure these rules do override system default destination.
+  this.initialSettings_.serializedDefaultDestinationSelectionRulesStr_ =
+      '{"namePattern":".*Bar.*"}';
+  this.setInitialSettings();
+  this.setLocalDestinations();
+
+  assertEquals(
+      'BarDevice', printPreview.destinationStore_.selectedDestination.id);
+
+  testDone();
+});
+
 TEST_F('PrintPreviewWebUITest', 'TestSystemDialogLinkIsHiddenInAppKioskMode',
     function() {
   if (cr.isChromeOS) {