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

content/browser/profiler_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 "content/browser/profiler_message_filter.h"
 
 #include "base/tracked_objects.h"
 #include "content/browser/profiler_controller_impl.h"
 #include "content/browser/tcmalloc_internals_request_job.h"
 #include "content/common/child_process_messages.h"
 
 namespace content {
 
 ProfilerMessageFilter::ProfilerMessageFilter(int process_type)
-    : BrowserMessageFilter(ChildProcessMsgStart),
-      process_type_(process_type) {
+    : process_type_(process_type) {
 }
 
 void ProfilerMessageFilter::OnChannelConnected(int32 peer_pid) {
   tracked_objects::ThreadData::Status status =
       tracked_objects::ThreadData::status();
   Send(new ChildProcessMsg_SetProfilerStatus(status));
 }
 
 bool ProfilerMessageFilter::OnMessageReceived(const IPC::Message& message,
                                               bool* message_was_ok) {
@@ skipping 19 matching lines @@
 }
 
 #if defined(USE_TCMALLOC)
 void ProfilerMessageFilter::OnTcmallocStats(const std::string& output) {
   AboutTcmallocOutputs::GetInstance()->OnStatsForChildProcess(
         peer_pid(), process_type_, output);
 }
 #endif
 
 }