Revert of Followup comments from r460581.

content/renderer/render_frame_impl.cc

 // Copyright 2013 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 "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 4737 matching lines @@
 void RenderFrameImpl::SuddenTerminationDisablerChanged(
     bool present,
     blink::WebFrameClient::SuddenTerminationDisablerType type) {
   switch (type) {
     case blink::WebFrameClient::kBeforeUnloadHandler:
       Send(new FrameHostMsg_BeforeUnloadHandlersPresent(routing_id_, present));
       break;
     case blink::WebFrameClient::kUnloadHandler:
       Send(new FrameHostMsg_UnloadHandlersPresent(routing_id_, present));
       break;
+    default:
+      NOTREACHED();
   }
 }
 
 void RenderFrameImpl::RegisterProtocolHandler(const WebString& scheme,
                                               const WebURL& url,
                                               const WebString& title) {
   bool user_gesture = WebUserGestureIndicator::IsProcessingUserGesture();
   Send(new FrameHostMsg_RegisterProtocolHandler(routing_id_, scheme.Utf8(), url,
                                                 title.Utf16(), user_gesture));
 }
@@ skipping 2207 matching lines @@
       policy(info.default_policy),
       replaces_current_history_item(info.replaces_current_history_item),
       history_navigation_in_new_child_frame(
           info.is_history_navigation_in_new_child_frame),
       client_redirect(info.is_client_redirect),
       cache_disabled(info.is_cache_disabled),
       form(info.form),
       source_location(info.source_location) {}
 
 }  // namespace content