Add chrome.usbPrivate API for use by USB device WEBUI.

device/usb/usb_service_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 "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/usb_service/usb_device.h"
 #include "components/usb_service/usb_device_handle.h"
 #include "device/test/usb_test_gadget.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 14 matching lines @@
   scoped_ptr<base::MessageLoop> message_loop_;
 };
 
 TEST_F(UsbServiceTest, ClaimGadget) {
   if (!UsbTestGadget::IsTestEnabled()) return;
 
   scoped_ptr<UsbTestGadget> gadget = UsbTestGadget::Claim();
   ASSERT_TRUE(gadget.get());
 
   scoped_refptr<UsbDeviceHandle> handle = gadget->GetDevice()->Open();
-  base::string16 serial_utf16;
-  ASSERT_TRUE(handle->GetSerial(&serial_utf16));
-  ASSERT_EQ(gadget->GetSerial(), base::UTF16ToUTF8(serial_utf16));
+
+  base::string16 utf16;
+  ASSERT_TRUE(handle->GetManufacturer(&utf16));
+  ASSERT_EQ("Google Inc.", base::UTF16ToUTF8(utf16));
+  // Check again to make sure string descriptor caching works.
+  ASSERT_EQ("Google Inc.", base::UTF16ToUTF8(utf16));
+
+  ASSERT_TRUE(handle->GetProduct(&utf16));
+  ASSERT_EQ("Test Gadget (default state)", base::UTF16ToUTF8(utf16));
+  // Check again to make sure string descriptor caching works.
+  ASSERT_EQ("Test Gadget (default state)", base::UTF16ToUTF8(utf16));
+
+  ASSERT_TRUE(handle->GetSerial(&utf16));
+  ASSERT_EQ(gadget->GetSerial(), base::UTF16ToUTF8(utf16));
+  // Check again to make sure string descriptor caching works.
+  ASSERT_EQ(gadget->GetSerial(), base::UTF16ToUTF8(utf16));
 }
 
 TEST_F(UsbServiceTest, DisconnectAndReconnect) {
   if (!UsbTestGadget::IsTestEnabled()) return;
 
   scoped_ptr<UsbTestGadget> gadget = UsbTestGadget::Claim();
   ASSERT_TRUE(gadget.get());
   ASSERT_TRUE(gadget->Disconnect());
   ASSERT_TRUE(gadget->Reconnect());
 }
 
 }  // namespace
 
 }  // namespace device