Print Preview: change getPreview to cr.sendWithPromise

chrome/browser/resources/print_preview/previewarea/preview_area.js

Index: chrome/browser/resources/print_preview/previewarea/preview_area.js
diff --git a/chrome/browser/resources/print_preview/previewarea/preview_area.js b/chrome/browser/resources/print_preview/previewarea/preview_area.js
index 994668d6547fee75fa9f4018832ebf7e02e3977d..4762b444f305bb7f6dee77f8360a1cff99f06409 100644
--- a/chrome/browser/resources/print_preview/previewarea/preview_area.js
+++ b/chrome/browser/resources/print_preview/previewarea/preview_area.js
@@ -192,7 +192,10 @@ cr.define('print_preview', function() {
 
     // Dispatched when a new document preview is being generated.
     PREVIEW_GENERATION_IN_PROGRESS:
-        'print_preview.PreviewArea.PREVIEW_GENERATION_IN_PROGRESS'
+        'print_preview.PreviewArea.PREVIEW_GENERATION_IN_PROGRESS',
+
+    // Dispatched when invalid printer settings are detected.
+    SETTINGS_INVALID: 'print_preview.PreviewArea.SETTINGS_INVALID'
   };
 
   /**
@@ -349,10 +352,6 @@ cr.define('print_preview', function() {
             this.previewGenerator_,
             print_preview.PreviewGenerator.EventType.PAGE_READY,
             this.onPagePreviewReady_.bind(this));
-        this.tracker.add(
-            this.previewGenerator_,
-            print_preview.PreviewGenerator.EventType.FAIL,
-            this.onPreviewGenerationFail_.bind(this));
         this.tracker.add(
             this.previewGenerator_,
             print_preview.PreviewGenerator.EventType.DOCUMENT_READY,
@@ -523,18 +522,43 @@ cr.define('print_preview', function() {
      * @private
      */
     onTicketChange_: function() {
-      if (this.previewGenerator_ && this.previewGenerator_.requestPreview()) {
-        cr.dispatchSimpleEvent(
-            this, PreviewArea.EventType.PREVIEW_GENERATION_IN_PROGRESS);
-        if (this.loadingTimeout_ == null) {
-          this.loadingTimeout_ = setTimeout(
-              this.showMessage_.bind(
-                  this, print_preview.PreviewAreaMessageId_.LOADING),
-              PreviewArea.LOADING_TIMEOUT_);
-        }
-      } else {
+      var requestPreview = this.previewGenerator_ ?
+          this.previewGenerator_.requestPreview() :
+          null;
+      var requestId = requestPreview ? requestPreview.id : -1;
+      if (requestId == -1) {
         this.marginControlContainer_.showMarginControlsIfNeeded();
+        return;
       }
+      cr.dispatchSimpleEvent(
+          this, PreviewArea.EventType.PREVIEW_GENERATION_IN_PROGRESS);
+      if (this.loadingTimeout_ == null) {
+        this.loadingTimeout_ = setTimeout(
+            this.showMessage_.bind(
+                this, print_preview.PreviewAreaMessageId_.LOADING),
+            PreviewArea.LOADING_TIMEOUT_);
+      }
+      requestPreview.request.then(
+          /** @param {number} previewUid The unique id of the preview. */
+          function(previewUid) {
+            this.previewGenerator_.onPreviewGenerationDone(
+                requestPreview.id, previewUid);
+          }.bind(this),
+          /**
+           * @param {*} type The type of print preview failure that
+           *     occurred.
+           */
+          function(type) {
+            if (/** @type{string} */ (type) == 'SETTINGS_INVALID') {
+              this.cancelTimeout();
+              this.showCustomMessage(
+                  loadTimeData.getString('invalidPrinterSettings'));
+              cr.dispatchSimpleEvent(
+                  this, PreviewArea.EventType.SETTINGS_INVALID);
+            } else {
+              this.onPreviewGenerationFail_();
+            }
+          }.bind(this));
     },
 
     /**