Remove IPC_BEGIN_MESSAGE_MAP_EX macro since r270839 made all bad IPCs kill their child processes.

content/browser/tracing/trace_message_filter.h

 // 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.
 
 #ifndef CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/debug/trace_event.h"
 #include "content/public/browser/browser_message_filter.h"
 
 namespace content {
 
 // This class sends and receives trace messages on the browser process.
 // See also: tracing_controller.h
 // See also: child_trace_message_filter.h
 class TraceMessageFilter : public BrowserMessageFilter {
  public:
   TraceMessageFilter();
 
   // BrowserMessageFilter implementation.
   virtual void OnChannelClosing() OVERRIDE;
-  virtual bool OnMessageReceived(const IPC::Message& message,
-                                 bool* message_was_ok) OVERRIDE;
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   void SendBeginTracing(const std::string& category_filter_str,
                         base::debug::TraceLog::Options options);
   void SendEndTracing();
   void SendEnableMonitoring(const std::string& category_filter_str,
                             base::debug::TraceLog::Options options);
   void SendDisableMonitoring();
   void SendCaptureMonitoringSnapshot();
   void SendGetTraceBufferPercentFull();
   void SendSetWatchEvent(const std::string& category_name,
@@ skipping 22 matching lines @@
   bool is_awaiting_capture_monitoring_snapshot_ack_;
   // Awaiting ack for previously sent SendGetTraceBufferPercentFull
   bool is_awaiting_buffer_percent_full_ack_;
 
   DISALLOW_COPY_AND_ASSIGN(TraceMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_