Print Preview: ignore document isScalingDisabled

Using isScalingDisabled to set the availability disabled the scaling
section for all PDFs. This CL restores the previous behavior of
ignoring this value and showing the scaling section for all documents.

Bug: 929830
Change-Id: Ibab11edaa68d839aa40dac988d997acbac24e0fc
Reviewed-on: https://chromium-review.googlesource.com/c/1459776
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#630152}

chrome/browser/resources/print_preview/new/model.js

@@ -317,7 +317,7 @@ Polymer({
     'updateSettingsFromDestination_(destination.capabilities)',
     'updateSettingsAvailabilityFromDocumentSettings_(' +
         'documentSettings.isModifiable, documentSettings.hasCssMediaStyles,' +
-        'documentSettings.hasSelection, documentSettings.isScalingDisabled)',
+        'documentSettings.hasSelection)',
     'updateHeaderFooterAvailable_(' +
         'margins, settings.margins.value, ' +
         'settings.customMargins.value, settings.mediaSize.value)',
@@ -412,11 +412,8 @@ Polymer({
     this.set('settings.fitToPage.unavailableValue', !isSaveAsPDF);
     this.set(
         'settings.fitToPage.available',
-        !knownSizeToSaveAsPdf && !this.documentSettings.isModifiable &&
-            !this.documentSettings.isScalingDisabled);
-    this.set(
-        'settings.scaling.available',
-        !knownSizeToSaveAsPdf && !this.documentSettings.isScalingDisabled);
+        !knownSizeToSaveAsPdf && !this.documentSettings.isModifiable);
+    this.set('settings.scaling.available', !knownSizeToSaveAsPdf);
     const caps = (!!this.destination && !!this.destination.capabilities) ?
         this.destination.capabilities.printer :
         null;