MidiManagerUsb should be able to accept multiple devices.

media/midi/midi_manager_usb_unittest.cc

Index: media/midi/midi_manager_usb_unittest.cc
diff --git a/media/midi/midi_manager_usb_unittest.cc b/media/midi/midi_manager_usb_unittest.cc
index 8552403024765aad2ceef1427bd516ea73c5ee52..b8044cd8b079622ab7ee12e52d8ce10f7fde98e1 100644
--- a/media/midi/midi_manager_usb_unittest.cc
+++ b/media/midi/midi_manager_usb_unittest.cc
@@ -250,6 +250,51 @@ TEST_F(MidiManagerUsbTest, Initialize) {
   EXPECT_EQ("UsbMidiDevice::GetDescriptor\n", logger_.TakeLog());
 }
 
+TEST_F(MidiManagerUsbTest, InitializeMultipleDevices) {
+  scoped_ptr<FakeUsbMidiDevice> device1(new FakeUsbMidiDevice(&logger_));
+  scoped_ptr<FakeUsbMidiDevice> device2(new FakeUsbMidiDevice(&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, 0x00, 0x00, 0x01, 0x01, 0x00, 0x00,
+      0x09, 0x24, 0x01, 0x00, 0x01, 0x09, 0x00, 0x01, 0x01, 0x09, 0x04, 0x01,
+      0x00, 0x02, 0x01, 0x03, 0x00, 0x00, 0x07, 0x24, 0x01, 0x00, 0x01, 0x51,
+      0x00, 0x06, 0x24, 0x02, 0x01, 0x02, 0x00, 0x06, 0x24, 0x02, 0x01, 0x03,
+      0x00, 0x06, 0x24, 0x02, 0x02, 0x06, 0x00, 0x09, 0x24, 0x03, 0x01, 0x07,
+      0x01, 0x06, 0x01, 0x00, 0x09, 0x24, 0x03, 0x02, 0x04, 0x01, 0x02, 0x01,
+      0x00, 0x09, 0x24, 0x03, 0x02, 0x05, 0x01, 0x03, 0x01, 0x00, 0x09, 0x05,
+      0x02, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00, 0x06, 0x25, 0x01, 0x02, 0x02,
+      0x03, 0x09, 0x05, 0x82, 0x02, 0x20, 0x00, 0x00, 0x00, 0x00, 0x05, 0x25,
+      0x01, 0x01, 0x07,
+  };
+  device1->SetDescriptor(ToVector(descriptor));
+  device2->SetDescriptor(ToVector(descriptor));
+
+  Initialize();
+  ScopedVector<UsbMidiDevice> devices;
+  devices.push_back(device1.release());
+  devices.push_back(device2.release());
+  EXPECT_FALSE(IsInitializationCallbackInvoked());
+  RunCallbackUntilCallbackInvoked(true, &devices);
+  EXPECT_EQ(MIDI_OK, GetInitializationResult());
+
+  ASSERT_EQ(2u, input_ports().size());
+  ASSERT_EQ(4u, output_ports().size());
+  ASSERT_TRUE(manager_->input_stream());
+  std::vector<UsbMidiInputStream::JackUniqueKey> keys =
+      manager_->input_stream()->RegisteredJackKeysForTesting();
+  ASSERT_EQ(4u, manager_->output_streams().size());
+  EXPECT_EQ(2u, manager_->output_streams()[0]->jack().jack_id);
+  EXPECT_EQ(3u, manager_->output_streams()[1]->jack().jack_id);
+  ASSERT_EQ(2u, keys.size());
+  EXPECT_EQ(2, keys[0].endpoint_number);
+
+  EXPECT_EQ(
+      "UsbMidiDevice::GetDescriptor\n"
+      "UsbMidiDevice::GetDescriptor\n",
+      logger_.TakeLog());
+}
+
 TEST_F(MidiManagerUsbTest, InitializeFail) {
   Initialize();