MD WebUI: temporary fix for <paper-textarea> a11y label problems

third_party/polymer/v1_0/chromium.patch

Index: third_party/polymer/v1_0/chromium.patch
diff --git a/third_party/polymer/v1_0/chromium.patch b/third_party/polymer/v1_0/chromium.patch
index f9d5a15a32410718971474ca43743c7dddaae0bb..8b99b23f099dfaa63080fe6a058cbaf9e4286782 100644
--- a/third_party/polymer/v1_0/chromium.patch
+++ b/third_party/polymer/v1_0/chromium.patch
@@ -9,3 +9,18 @@ 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/paper-input/paper-textarea-extracted.js b/components-chromium/paper-input/paper-textarea-extracted.js
+index 78a2a9ec621c..8b776dd790ea 100644
+--- a/components-chromium/paper-input/paper-textarea-extracted.js
++++ b/components-chromium/paper-input/paper-textarea-extracted.js
+@@ -43,8 +43,8 @@ Polymer({
+       }
+     },
+ 
+-    _ariaLabelledByChanged: function(ariaLabelledBy) {
+-      this.$.input.textarea.setAttribute('aria-labelledby', ariaLabelledBy);
++    _ariaLabelledByChanged: function() {
++      this.$.input.textarea.setAttribute('aria-label', this.label);
+     },
+ 
+     _ariaDescribedByChanged: function(ariaDescribedBy) {