media: Enable ProtectedMediaIdentifierPermissionContext on ChromeOS.

chrome/browser/content_settings/tab_specific_content_settings.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
 
 #include <list>
 
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
@@ skipping 508 matching lines @@
 void TabSpecificContentSettings::OnGeolocationPermissionSet(
     const GURL& requesting_origin,
     bool allowed) {
   geolocation_usages_state_.OnPermissionSet(requesting_origin, allowed);
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_WEB_CONTENT_SETTINGS_CHANGED,
       content::Source<WebContents>(web_contents()),
       content::NotificationService::NoDetails());
 }
 
-#if defined(OS_ANDROID)
+#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
 void TabSpecificContentSettings::OnProtectedMediaIdentifierPermissionSet(
     const GURL& requesting_origin,
     bool allowed) {
   if (allowed) {
     OnContentAllowed(CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER);
   } else {
     OnContentBlocked(CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER);
   }
 }
 #endif
@@ skipping 273 matching lines @@
 
 void TabSpecificContentSettings::GeolocationDidNavigate(
     const content::LoadCommittedDetails& details) {
   geolocation_usages_state_.DidNavigate(GetCommittedDetails(details));
 }
 
 void TabSpecificContentSettings::MidiDidNavigate(
     const content::LoadCommittedDetails& details) {
   midi_usages_state_.DidNavigate(GetCommittedDetails(details));
 }