Set orientation to 'AUTO' if we hide orientation option from user.

BUG=383877

Review URL: https://codereview.chromium.org/580203002

Cr-Commit-Position: refs/heads/master@{#295545}

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

@@ -420,8 +420,13 @@ cr.define('print_preview', function() {
           vendor_id: value.vendor_id
         };
       }
-      if (this.landscape.isCapabilityAvailable() &&
-          this.landscape.isUserEdited()) {
+      if (!this.landscape.isCapabilityAvailable()) {
+        // In this case "orientation" option is hidden from user, so user can't
+        // adjust it for page content, see Landscape.isCapabilityAvailable().
+        // We can improve results if we set AUTO here.
+        if (this.landscape.hasOption('AUTO'))
+          cjt.print.page_orientation = { type: 'AUTO' };
+      } else if (this.landscape.isUserEdited()) {
         cjt.print.page_orientation =
             {type: this.landscape.getValue() ? 'LANDSCAPE' : 'PORTRAIT'};
       }

chrome/browser/resources/print_preview/data/ticket_items/landscape.js

@@ -57,9 +57,8 @@ cr.define('print_preview.ticket_items', function() {
     /** @override */
     isCapabilityAvailable: function() {
       var cap = this.getPageOrientationCapability_();
-      if (!cap) {
+      if (!cap)
         return false;
-      }
       var hasAutoOrPortraitOption = false;
       var hasLandscapeOption = false;
       cap.option.forEach(function(option) {
@@ -109,6 +108,19 @@ cr.define('print_preview.ticket_items', function() {
       }
     },
 
+    /**
+     * @return {boolean} Whether capability contains the |value|.
+     * @param {string} value Option to check.
+     */
+    hasOption: function(value) {
+      var cap = this.getPageOrientationCapability_();
+      if (!cap)
+        return false;
+      return cap.option.some(function(option) {
+        return option.type == value;
+      });
+    },
+
     /**
      * @return {Object} Page orientation capability of the selected destination.
      * @private