[MD settings] observe changes to default font size in Appearance

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

Index: chrome/browser/resources/settings/appearance_page/appearance_fonts_page.html
diff --git a/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.html b/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.html
index 7b2fc2ff8fc434e0e15e579b5b3ae40727ef52d2..72fac987255be102e0434689abb2f4497b8f0075 100644
--- a/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.html
+++ b/chrome/browser/resources/settings/appearance_page/appearance_fonts_page.html
@@ -111,13 +111,11 @@
       </div>
       <div class="list-item"
           style="
-              font-size:[[prefs.webkit.webprefs.default_font_size.value]]px;
+              font-size:
+                  [[prefs.webkit.webprefs.default_fixed_font_size.value]]px;

[dschuyler, 2017/04/15 01:27:57]

This is part of the 'also fixed' an not the primary fix in this CL. This wasn't
actually showing the example in the correct font size.

               font-family:
                   '[[prefs.webkit.webprefs.fonts.fixed.Zyyy.value]]';">
-        <span>
-          [[prefs.webkit.webprefs.default_font_size.value]]:
-          $i18n{quickBrownFox}
-        </span>
+        $i18n{quickBrownFox}

[dschuyler, 2017/04/15 01:27:57]

So it looks strange to show that this is 3px smaller than the others. I looked
to see what was done previously and the font size is simply not shown for the
fixed font size, which is less distracting.

[michaelpg, 2017/04/17 20:06:28]

SGTM. It would be more consistent to remove the prefixes on the other samples,
too, but we'd need to show it somewhere (the font size row, maybe?) and that's a
whole 'nother UX decision.

[dschuyler, 2017/04/17 21:26:11]

Acknowledged.

       </div>
     </div>
     <template is="dom-if" if="[[!isGuest_]]">