UsbContextForTest 22 chrome/browser/usb/usb_context_unittest.cc DISALLOW_COPY_AND_ASSIGN(UsbContextForTest); UsbContextForTest 43 chrome/browser/usb/usb_context_unittest.cc scoped_refptr<UsbContextForTest> context( UsbContextForTest 44 chrome/browser/usb/usb_context_unittest.cc new UsbContextForTest(platform_context));