Print Preview: Change getPrinters to cr.sendWithPromise

chrome/test/data/webui/print_preview/native_layer_stub.js

Index: chrome/test/data/webui/print_preview/native_layer_stub.js
diff --git a/chrome/test/data/webui/print_preview/native_layer_stub.js b/chrome/test/data/webui/print_preview/native_layer_stub.js
index d16b11b77a1f6e7b13cb4ca1f9de3ce1b39114c5..ef65b8f19e82c7124a91c1ab3c86ec43b865b9ce 100644
--- a/chrome/test/data/webui/print_preview/native_layer_stub.js
+++ b/chrome/test/data/webui/print_preview/native_layer_stub.js
@@ -10,7 +10,7 @@ cr.define('print_preview', function() {
   */
   function NativeLayerStub() {
     settings.TestBrowserProxy.call(this, [
-        'getInitialSettings', 'setupPrinter' ]);
+        'getInitialSettings', 'getPrinters', 'setupPrinter' ]);
 
     /**
      * @private {!cr.EventTarget} The event target used for dispatching and
@@ -34,6 +34,13 @@ cr.define('print_preview', function() {
     this.initialSettings_ = null;
 
     /**
+     *
+     * @private {Array<print_preview.LocalDestinationInfo>} Local destination

[dpapad, 2017/06/01 19:01:53]

?Array<!

Or set initial value to an empty array, and annotate as "!Array<!..."

[rbpotter, 2017/06/01 22:31:12]

Done.

+     *     list to be used for the response to |getPrinters|.
+     */
+    this.localDestinationInfos_ = null;
+
+    /**
      * @private {!print_preview.PrinterSetupResponse} The response to be sent
      *     on a |setupPrinter| call.
      */
@@ -67,6 +74,12 @@ cr.define('print_preview', function() {
     },
 
     /** @override */
+    getPrinters: function() {
+      this.methodCalled('getPrinters');
+      return Promise.resolve(this.localDestinationInfos_);
+    },
+
+    /** @override */
     setupPrinter: function(printerId) {
       this.methodCalled('setupPrinter', printerId);
       return this.shouldRejectPrinterSetup_ ?
@@ -132,6 +145,14 @@ cr.define('print_preview', function() {
     },
 
     /**
+     * @param {!Array<print_preview.LocalDestinationInfo>} localDestinations
+     *     The local destinations to return as a response to |getPrinters|.
+     */
+    setLocalDestinations: function(localDestinations) {
+      this.localDestinationInfos_ = localDestinations;
+    },
+
+    /**
      * @param {boolean} reject Whether printSetup requests should be rejected.
      * @param {!print_preview.PrinterSetupResponse} The response to send when
      *     |setupPrinter| is called.