Web MIDI: add MidiScheduler for send() with timestamp

media/midi/midi_manager_usb_unittest.cc

 // Copyright 2014 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 "media/midi/midi_manager_usb.h"
 
 #include <string>
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 336 matching lines @@
 
   Initialize();
   ScopedVector<UsbMidiDevice> devices;
   devices.push_back(device.release());
   EXPECT_FALSE(IsInitializationCallbackInvoked());
   RunCallbackUntilCallbackInvoked(true, &devices);
   EXPECT_EQ(MIDI_OK, GetInitializationResult());
   ASSERT_EQ(2u, manager_->output_streams().size());
 
   manager_->DispatchSendMidiData(&client, 1, ToVector(data), 0);
+  // Since UsbMidiDevice::Send is posted as a task, RunLoop should run to
+  // invoke the task.
+  // TODO(crbug.com/467442): AccumulateMidiBytesSent is recorded before
+  // UsbMidiDevice is invoked for now, but this should be after the invocation.
+  base::RunLoop run_loop;
+  run_loop.RunUntilIdle();
   EXPECT_EQ("UsbMidiDevice::GetDescriptor\n"
+            "MidiManagerClient::AccumulateMidiBytesSent size = 7\n"
             "UsbMidiDevice::Send endpoint = 2 data = "
             "0x19 0x90 0x45 0x7f "
             "0x14 0xf0 0x00 0x01 "
-            "0x15 0xf7 0x00 0x00\n"
-            "MidiManagerClient::AccumulateMidiBytesSent size = 7\n",
+            "0x15 0xf7 0x00 0x00\n",
             logger_.TakeLog());
 }
 
 TEST_F(MidiManagerUsbTest, SendFromCompromizedRenderer) {
   scoped_ptr<FakeUsbMidiDevice> device(new FakeUsbMidiDevice(&logger_));
   FakeMidiManagerClient client(&logger_);
   uint8 descriptor[] = {
     0x12, 0x01, 0x10, 0x01, 0x00, 0x00, 0x00, 0x08, 0x86, 0x1a,
     0x2d, 0x75, 0x54, 0x02, 0x00, 0x02, 0x00, 0x01, 0x09, 0x02,
     0x75, 0x00, 0x02, 0x01, 0x00, 0x80, 0x30, 0x09, 0x04, 0x00,
@@ skipping 126 matching lines @@
   EXPECT_EQ(2u, manager_->output_streams()[0]->jack().jack_id);
   EXPECT_EQ(3u, manager_->output_streams()[1]->jack().jack_id);
   ASSERT_EQ(1u, jacks.size());
   EXPECT_EQ(2, jacks[0].endpoint_number());
   EXPECT_EQ("UsbMidiDevice::GetDescriptor\n", logger_.TakeLog());
 }
 
 }  // namespace
 
 }  // namespace media