MD Settings: Move browserProxies outside of Polymer "properties".

chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js

Index: chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js
diff --git a/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js b/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js
index 7d1509dce477c5d79e3c788cdec6a4ca8b5e3b7e..e9ca220be5fc5d4a81903a7782056d3b79f3c76b 100644
--- a/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js
+++ b/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js
@@ -47,9 +47,6 @@
       /** @private */
       advancedExtensionUrl_: String,
 
-      /** @private {!settings.FontsBrowserProxy} */
-      browserProxy_: Object,
-
       /** @private {!DropdownMenuOptionList} */
       fontOptions_: Object,
 
@@ -92,6 +89,9 @@
       'fontSizeChanged_(prefs.webkit.webprefs.default_font_size.value)',
     ],
 
+    /** @private {?settings.FontsBrowserProxy} */
+    browserProxy_: null,
+
     /** @override */
     created: function() {
       this.browserProxy_ = settings.FontsBrowserProxyImpl.getInstance();