Removed the protected content exceptions button.

chrome/browser/resources/options/content_settings.html

 <div id="content-settings-page" class="page" hidden>
   <div class="close-button"></div>
   <h1 i18n-content="contentSettingsPage"></h1>
   <div class="content-area">
     <!-- Cookie filter tab contents -->
     <section>
       <h3 i18n-content="cookies_tab_label"></h3>
       <div>
         <div class="radio">
           <span class="controlled-setting-with-label">
@@ skipping 393 matching lines @@
       <div>
         <div class="settings-row">
           <p i18n-content="protectedContentInfo"></p>
         </div>
         <div class="checkbox">
           <label>
             <input pref="settings.privacy.drm_enabled" type="checkbox">
             <span i18n-content="protectedContentEnable"></span>
           </label>
         </div>
-        <div class="settings-row">
-          <button class="exceptions-list-button" contentType="protectedContent"
-              i18n-content="manageExceptions"></button>
-        </div>
       </div>
     </section>
 </if>
     <!-- Media Stream capture device filter -->
     <section>
       <div class="section-header">
         <h3 i18n-content="mediaStreamTabLabel"></h3>
         <span id="media-indicator"
             class="controlled-setting-indicator group-indicator"></span>
       </div>
@@ skipping 163 matching lines @@
     </section>
   </div>
   <div class="action-area">
     <div class="button-strip">
       <button id="content-settings-overlay-confirm" class="default-button"
           i18n-content="done">
       </button>
     </div>
   </div>
 </div>