Refactor ProtectedMediaIdentifierPermissionContext to derive from PermissionContextBase.

chrome/browser/content_settings/permission_context_uma_util.cc

Index: chrome/browser/content_settings/permission_context_uma_util.cc
diff --git a/chrome/browser/content_settings/permission_context_uma_util.cc b/chrome/browser/content_settings/permission_context_uma_util.cc
index 566e9aaf401308754129cc3e4c0a3895fbb1d835..4e025f88d88fe39047feb0e6ade2abfa460c9d56 100644
--- a/chrome/browser/content_settings/permission_context_uma_util.cc
+++ b/chrome/browser/content_settings/permission_context_uma_util.cc
@@ -105,6 +105,11 @@ void RecordPermissionRequest(
     case CONTENT_SETTINGS_TYPE_PUSH_MESSAGING:
       type = content::PERMISSION_PUSH_MESSAGING;
       break;
+#if defined(OS_ANDROID)
+    case CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER:
+      type = content::PERMISSION_PROTECTED_MEDIA;
+      break;
+#endif
     default:
       NOTREACHED() << "PERMISSION " << permission << " not accounted for";
       return;