Mojo: MultiprocessTestHelper: Allow {ASSERT,EXPECT}_...() to be used in child.

mojo/common/test/multiprocess_test_helper.cc

 // Copyright 2013 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 "mojo/common/test/multiprocess_test_helper.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
@@ skipping 48 matching lines @@
   CHECK_NE(test_child_handle_, base::kNullProcessHandle);
 
   int rv = -1;
   CHECK(base::WaitForExitCodeWithTimeout(
       test_child_handle_, &rv, TestTimeouts::action_timeout()));
   base::CloseProcessHandle(test_child_handle_);
   test_child_handle_ = base::kNullProcessHandle;
   return rv;
 }
 
+bool MultiprocessTestHelper::WaitForChildTestShutdown() {
+  return WaitForChildShutdown() == 0;
+}
+
 // static
 void MultiprocessTestHelper::ChildSetup() {
   CHECK(CommandLine::InitializedForCurrentProcess());
   client_platform_handle =
       embedder::PlatformChannelPair::PassClientHandleFromParentProcess(
           *CommandLine::ForCurrentProcess());
 }
 
 // static
 embedder::ScopedPlatformHandle MultiprocessTestHelper::client_platform_handle;
 
 }  // namespace test
 }  // namespace mojo