EDK: Make mojo::platform::TaskRunner's PostTask() take an std::function<void()>.

mojo/edk/system/message_pipe_test_utils.cc

Index: mojo/edk/system/message_pipe_test_utils.cc
diff --git a/mojo/edk/system/message_pipe_test_utils.cc b/mojo/edk/system/message_pipe_test_utils.cc
index 8d76c97306c887a9373ff31dd8d24329895d1eeb..38597c5de7eb914030dd7d551473b3e0cd3404e3 100644
--- a/mojo/edk/system/message_pipe_test_utils.cc
+++ b/mojo/edk/system/message_pipe_test_utils.cc
@@ -51,6 +51,8 @@ ChannelThread::~ChannelThread() {
 void ChannelThread::Start(ScopedPlatformHandle platform_handle,
                           RefPtr<ChannelEndpoint>&& channel_endpoint) {
   test_io_thread_.Start();
+  // TODO(vtl): This is hard to convert to a lambda, since we really need to
+  // move |platform_handle|.
   test_io_thread_.PostTaskAndWait(
       base::Bind(&ChannelThread::InitChannelOnIOThread, base::Unretained(this),
                  base::Passed(&platform_handle),
@@ -65,8 +67,10 @@ void ChannelThread::Stop() {
     while (!channel_->IsWriteBufferEmpty())
       test::Sleep(test::EpsilonTimeout());
 
-    test_io_thread_.PostTaskAndWait(base::Bind(
-        &ChannelThread::ShutdownChannelOnIOThread, base::Unretained(this)));
+    test_io_thread_.PostTaskAndWait([this] {
+      channel_->Shutdown();
+      channel_ = nullptr;
+    });
   }
   test_io_thread_.Stop();
 }
@@ -90,12 +94,6 @@ void ChannelThread::InitChannelOnIOThread(
   channel_->SetBootstrapEndpoint(std::move(channel_endpoint));
 }
 
-void ChannelThread::ShutdownChannelOnIOThread() {
-  CHECK(channel_);
-  channel_->Shutdown();
-  channel_ = nullptr;
-}
-
 #if !defined(OS_IOS)
 MultiprocessMessagePipeTestBase::MultiprocessMessagePipeTestBase()
     : channel_thread_(&platform_support_) {
@@ -107,7 +105,7 @@ MultiprocessMessagePipeTestBase::~MultiprocessMessagePipeTestBase() {
 void MultiprocessMessagePipeTestBase::Init(RefPtr<ChannelEndpoint>&& ep) {
   channel_thread_.Start(helper_.server_platform_handle.Pass(), std::move(ep));
 }
-#endif
+#endif  // !defined(OS_IOS)
 
 }  // namespace test
 }  // namespace system