Revert "Allow MessageFilters to restrict listening to specific message classes"

chrome/browser/chrome_net_benchmarking_message_filter.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/chrome_net_benchmarking_message_filter.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
-#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "chrome/browser/net/predictor.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/benchmarking_messages.h"
 #include "chrome/common/chrome_switches.h"
 #include "net/base/net_errors.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/dns/host_cache.h"
 #include "net/dns/host_resolver.h"
 #include "net/http/http_cache.h"
 #include "net/http/http_network_layer.h"
 #include "net/http/http_stream_factory.h"
 
 namespace {
 
 void ClearCacheCallback(ChromeNetBenchmarkingMessageFilter* filter,
                         IPC::Message* reply_msg,
                         int result) {
   ChromeViewHostMsg_ClearCache::WriteReplyParams(reply_msg, result);
   filter->Send(reply_msg);
 }
 
 }  // namespace
 
 ChromeNetBenchmarkingMessageFilter::ChromeNetBenchmarkingMessageFilter(
     Profile* profile,
     net::URLRequestContextGetter* request_context)
-    : BrowserMessageFilter(ChromeBenchmarkingMsgStart),
-      profile_(profile),
+    : profile_(profile),
       request_context_(request_context) {
 }
 
 ChromeNetBenchmarkingMessageFilter::~ChromeNetBenchmarkingMessageFilter() {
 }
 
 bool ChromeNetBenchmarkingMessageFilter::OnMessageReceived(
     const IPC::Message& message, bool* message_was_ok) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP_EX(ChromeNetBenchmarkingMessageFilter, message,
@@ skipping 110 matching lines @@
   static bool checked = false;
   static bool result = false;
   if (!checked) {
     const CommandLine& command_line = *CommandLine::ForCurrentProcess();
     result = command_line.HasSwitch(switches::kEnableNetBenchmarking);
     checked = true;
   }
   return result;
 }