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

ipc/ipc_message_unittest.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 "ipc/ipc_message.h"
 
 #include <string.h>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
@@ skipping 70 matching lines @@
   bad_msg.WriteInt(99);
   iter = PickleIterator(bad_msg);
   EXPECT_FALSE(IPC::ReadParam(&bad_msg, &iter, &output));
 }
 
 class IPCMessageParameterTest : public testing::Test {
  public:
   IPCMessageParameterTest() : extra_param_("extra_param"), called_(false) {}
 
   bool OnMessageReceived(const IPC::Message& message) {
-    bool msg_is_ok = true;
     bool handled = true;
     IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(IPCMessageParameterTest, message,
-                                     msg_is_ok, &extra_param_)
+                                     &extra_param_)
       IPC_MESSAGE_HANDLER(TestMsgClassEmpty, OnEmpty)
       IPC_MESSAGE_HANDLER(TestMsgClassI, OnInt)
       //IPC_MESSAGE_HANDLER(TestMsgClassIS, OnSync)
       IPC_MESSAGE_UNHANDLED(handled = false)
     IPC_END_MESSAGE_MAP()
 
     return handled;
   }
 
   void OnEmpty(std::string* extra_param) {
@@ skipping 39 matching lines @@
 /* TODO: handle sync IPCs
 TEST_F(IPCMessageParameterTest, Sync) {
   std::string output;
   TestMsgClassIS message(42, &output);
   EXPECT_TRUE(OnMessageReceived(message));
   EXPECT_TRUE(called_);
   EXPECT_EQ(output, std::string("out"));
 }*/
 
 }  // namespace