[MD settings] set pref to valid slider value

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 17d826a81fed428b956b7e2cb4960f367716a12a..a0f50aa0ea3ac94c04ca95dd8ff4eebd2912f4d4 100644
--- a/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js
+++ b/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.js
@@ -156,7 +156,29 @@
     },
 
     /**
-     * Creates an html style value.
+     * Get the minimum font size, accounting for unset prefs.
+     * @return {string}
+     * @private
+     */
+    computeMinimumFontSize_: function() {
+      var value = this.get('prefs.webkit.webprefs.minimum_font_size.value');
+      return (value ? value : MINIMUM_FONT_SIZE_RANGE_[0]).toString();

[Dan Beam, 2017/03/14 03:27:19]

(value || MINIMUM_FONT_SIZE_RANGE_[0])

why toString?

[dschuyler, 2017/03/14 18:55:31]

Done.

+    },
+
+    /**
+     * Creates an html style value for the minimum font size.
+     * @param {number} fontSize The font size to use.
+     * @param {string} fontFamily The name of the font family use.
+     * @return {string}
+     * @private
+     */
+    computeMinimumStyle_: function(fontSize, fontFamily) {
+      return 'font-size: ' + this.computeMinimumFontSize_() +
+          "px; font-family: '" + fontFamily + "';";
+    },
+
+    /**
+     * Creates an html style value for the default font size.
      * @param {number} fontSize The font size to use.
      * @param {string} fontFamily The name of the font family use.
      * @return {string}