Example of how to interpose yourself in a message stream.

content/common/content_switches.cc

 // Copyright (c) 2011 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/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 115 matching lines @@
 
 // Enables the benchmarking extensions.
 const char kEnableBenchmarking[]            = "enable-benchmarking";
 
 // Enables device motion events.
 const char kEnableDeviceMotion[]            = "enable-device-motion";
 
 // Enable the GPU plugin and Pepper 3D rendering.
 const char kEnableGPUPlugin[]               = "enable-gpu-plugin";
 
+// Enable the IPC fuzzer for reliability testing
+const char kEnableIPCFuzzing[]               = "enable-ipc-fuzzing";
+
 // Force logging to be enabled.  Logging is disabled by default in release
 // builds.
 const char kEnableLogging[]                 = "enable-logging";
 
 // On Windows, converts the page to the currently-installed monitor profile.
 // This does NOT enable color management for images. The source is still
 // assumed to be sRGB.
 const char kEnableMonitorProfile[]          = "enable-monitor-profile";
 
 // Enable caching of pre-parsed JS script data.  See http://crbug.com/32407.
@@ skipping 251 matching lines @@
 // Enable Pepper and JavaScript P2P API.
 const char kEnableP2PApi[]                  = "enable-p2papi";
 #endif
 
 #if !defined(OFFICIAL_BUILD)
 // Causes the renderer process to throw an assertion on launch.
 const char kRendererCheckFalseTest[]        = "renderer-check-false-test";
 #endif
 
 }  // namespace switches