styleguide: Allow C++11 "enum class"

Review URL: https://codereview.chromium.org/667483003

Cr-Commit-Position: refs/heads/master@{#300291}

styleguide/c++/c++11.html

@@ -83,6 +83,18 @@ href="https://google-styleguide.googlecode.com/svn/trunk/cppguide.html#auto">Goo
 Style Guide on <code>auto</code></a>. <a href="https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/OQyYSfH9m2M">Discussion thread</a></td>
 </tr>
 
+<tr>
+<td>Enumerated Type Classes</td>
+<td><code>enum class <i>classname</i></code></td>
+<td>Provide enums as full classes, with no implicit
+conversion to booleans or integers</td>
+<td><a href="http://stackoverflow.com/questions/6936030/do-we-really-need-enum-class-in-c11">
+enum-class</a></td>
+<td>Enum classes are still enums and follow enum naming rules
+(which means SHOUTY_CASE in the <a href="http://www.chromium.org/developers/coding-style#Naming">current style guide</a>).
+<a href="https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/Q5WmkAImanc">Discussion thread</a></td>
+</tr>
+
 <tr>
 <td>Final Specifier</td>
 <td><code>final</code></td>
@@ -333,16 +345,6 @@ Introduction to the C++11 feature: delegating constructors</a></td>
 <td><a href="https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/0zVA8Ctx3Xo">Discussion thread</a></td>
 </tr>
 
-<tr>
-<td>Enumerated Type Classes</td>
-<td><code>enum class <i>classname</i></code></td>
-<td>Provide enums as full classes, with no implicit
-conversion to booleans or integers</td>
-<td><a href="http://stackoverflow.com/questions/6936030/do-we-really-need-enum-class-in-c11">
-enum-class</a></td>
-<td><a href="https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/Q5WmkAImanc">Discussion thread</a></td>
-</tr>
-
 <tr>
 <td>Exception Features</td>
 <td><code>noexcept</code>, <code>exception_ptr</code>,