Print Preview Destinations Dropdown: Polymer changes

Adding a createIcon() method to IronIconsetSvg, to allow icons in
the iconset to be retrieved and added inline outside of iron-icons. This
is required for Print Preview to use the destination icons in the
background of a dropdown menu while keeping the icons in its iconset.

Bug: 920056
Change-Id: I8f8b68c190cec8b31d9dc5d91adf182adca796f8
Reviewed-on: https://chromium-review.googlesource.com/c/1405457Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#622175}

third_party/closure_compiler/externs/pending.js

@@ -83,6 +83,26 @@ class ResizeObserver {
  */
 Polymer.RenderStatus.beforeNextRender = function(element, fn, args) {};
 
+/**
+ * @see
+ * https://www.webcomponents.org/element/@polymer/iron-iconset-svg
+ * Polymer iconset of SVGs.
+ * @implements {Polymer.Iconset}
+ * @constructor
+ * TODO(rbpotter): Remove this once it is added to Closure Compiler itself.
+ */
+Polymer.IronIconsetSvg = function() {};
+
+/**
+ * Added to IronIconsetSvg in chromium.patch.
+ * @param {string} iconName Name of the icon to apply.
+ * @param {boolean} targetIsRTL Whether the target element is RTL.
+ * @return {Element} Returns an installable clone of the SVG element
+ *     matching `id`.
+ * TODO(rbpotter): Remove this once it is added to Closure Compiler itself.
+ */
+Polymer.IronIconsetSvg.prototype.createIcon = function(iconName, targetIsRTL) {};
+
 /**
  * @see
  * https://github.com/tc39/proposal-bigint

third_party/polymer/v1_0/chromium.patch

@@ -9,6 +9,29 @@ index 7a24999..4eefcba 100644
 -<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:400,300,300italic,400italic,500,500italic,700,700italic">
 -<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto+Mono:400,700">
 +<link rel="stylesheet" href="chrome://resources/css/roboto.css">
+diff --git a/components-chromium/iron-iconset-svg/iron-iconset-svg-extracted.js b/components-chromium/iron-iconset-svg/iron-iconset-svg-extracted.js
+index 2edddb115d46..d3c7fbe36d63 100644
+--- a/components-chromium/iron-iconset-svg/iron-iconset-svg-extracted.js
++++ b/components-chromium/iron-iconset-svg/iron-iconset-svg-extracted.js
+@@ -131,6 +131,18 @@
+       return null;
+     },
+
++    /**
++     * Produce installable clone of the SVG element matching `id` in this
++     * iconset, or `undefined` if there is no matching element.
++     * @param {string} iconName Name of the icon to apply.
++     * @param {boolean} targetIsRTL Whether the target element is RTL.
++     * @return {Element} Returns an installable clone of the SVG element
++     *     matching `id`.
++     */
++    createIcon: function(iconName, targetIsRTL) {
++      return this._cloneIcon(iconName, this.rtlMirroring && targetIsRTL);
++    },
++
+     /**
+      * Remove an icon from the given element by undoing the changes effected
+      * by `applyIcon`.
 diff --git a/components-chromium/iron-list/iron-list-extracted.js b/components-chromium/iron-list/iron-list-extracted.js
 index 43c59653a39b..26652936735c 100644
 --- a/components-chromium/iron-list/iron-list-extracted.js

third_party/polymer/v1_0/components-chromium/iron-iconset-svg/iron-iconset-svg-extracted.js

@@ -131,6 +131,18 @@
       return null;
     },
 
+    /**
+     * Produce installable clone of the SVG element matching `id` in this
+     * iconset, or `undefined` if there is no matching element.
+     * @param {string} iconName Name of the icon to apply.
+     * @param {boolean} targetIsRTL Whether the target element is RTL.
+     * @return {Element} Returns an installable clone of the SVG element
+     *     matching `id`.
+     */
+    createIcon: function(iconName, targetIsRTL) {
+      return this._cloneIcon(iconName, this.rtlMirroring && targetIsRTL);
+    },
+
     /**
      * Remove an icon from the given element by undoing the changes effected
      * by `applyIcon`.