Move device/usb classes from the FILE thread to UI thread.

device/usb/usb_service_unittest.cc

Index: device/usb/usb_service_unittest.cc
diff --git a/device/usb/usb_service_unittest.cc b/device/usb/usb_service_unittest.cc
index edd07123ecd57e28c4d4b398ca55fe10994ed8df..f0e5ae272af14ba101736523e17431c056caac27 100644
--- a/device/usb/usb_service_unittest.cc
+++ b/device/usb/usb_service_unittest.cc
@@ -4,6 +4,7 @@
 
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/test/test_io_thread.h"
 #include "device/test/usb_test_gadget.h"
 #include "device/usb/usb_device.h"
 #include "device/usb/usb_device_handle.h"
@@ -15,34 +16,34 @@ namespace {
 
 class UsbServiceTest : public ::testing::Test {
  public:
-  void SetUp() override { message_loop_.reset(new base::MessageLoopForIO); }
+  void SetUp() override {
+    message_loop_.reset(new base::MessageLoopForUI);
+    io_thread_.reset(new base::TestIOThread(base::TestIOThread::kAutoStart));
+  }
 
- private:
+ protected:
   scoped_ptr<base::MessageLoop> message_loop_;
+  scoped_ptr<base::TestIOThread> io_thread_;
 };
 
 TEST_F(UsbServiceTest, ClaimGadget) {
   if (!UsbTestGadget::IsTestEnabled()) return;
 
-  scoped_ptr<UsbTestGadget> gadget = UsbTestGadget::Claim();
+  scoped_ptr<UsbTestGadget> gadget =
+      UsbTestGadget::Claim(io_thread_->task_runner());
   ASSERT_TRUE(gadget.get());
 
   scoped_refptr<UsbDevice> device = gadget->GetDevice();
-  base::string16 utf16;
-  ASSERT_TRUE(device->GetManufacturer(&utf16));
-  ASSERT_EQ("Google Inc.", base::UTF16ToUTF8(utf16));
-
-  ASSERT_TRUE(device->GetProduct(&utf16));
-  ASSERT_EQ("Test Gadget (default state)", base::UTF16ToUTF8(utf16));
-
-  ASSERT_TRUE(device->GetSerialNumber(&utf16));
-  ASSERT_EQ(gadget->GetSerialNumber(), base::UTF16ToUTF8(utf16));
+  ASSERT_EQ("Google Inc.", base::UTF16ToUTF8(device->manufacturer_string()));
+  ASSERT_EQ("Test Gadget (default state)",
+            base::UTF16ToUTF8(device->product_string()));
 }
 
 TEST_F(UsbServiceTest, DisconnectAndReconnect) {
   if (!UsbTestGadget::IsTestEnabled()) return;
 
-  scoped_ptr<UsbTestGadget> gadget = UsbTestGadget::Claim();
+  scoped_ptr<UsbTestGadget> gadget =
+      UsbTestGadget::Claim(io_thread_->task_runner());
   ASSERT_TRUE(gadget.get());
   ASSERT_TRUE(gadget->Disconnect());
   ASSERT_TRUE(gadget->Reconnect());