MD Settings: consolidate .no-outline css rules.

chrome/browser/resources/settings/settings_shared_css.html

Index: chrome/browser/resources/settings/settings_shared_css.html
diff --git a/chrome/browser/resources/settings/settings_shared_css.html b/chrome/browser/resources/settings/settings_shared_css.html
index 4aa064296b0e9e7779b26676d9ea1eecea94f176..fb424ccc2ed6e3935e3c8d2a426d85cf7f2df770 100644
--- a/chrome/browser/resources/settings/settings_shared_css.html
+++ b/chrome/browser/resources/settings/settings_shared_css.html
@@ -303,10 +303,10 @@
         flex: auto;
       }
 
+      .no-outline,
       [scrollable] .no-outline {

[dpapad, 2017/04/03 23:45:50]

Isn't "[scrollable] .no-outline" redundant here?

[scottchen, 2017/04/04 17:44:24]

There are other "[scrollable] .something" rules that are considered more
specific than .no-outline, so this is necessary to override those.

         background: none;
         outline: none;
-        cursor: initial;
       }
 
       /* The secondary-action wraps a clickable sub-area of a .settings-box.