Extracted UsbDeviceHandle as interface.

components/usb_service/usb_device_impl.cc

Index: components/usb_service/usb_device_impl.cc
diff --git a/components/usb_service/usb_device_impl.cc b/components/usb_service/usb_device_impl.cc
index f1d69a319fc35577d38390d060bf160055ea211b..43c8c66fbd43ad92dcb0cbaa2f6b481315eeded4 100644
--- a/components/usb_service/usb_device_impl.cc
+++ b/components/usb_service/usb_device_impl.cc
@@ -8,7 +8,7 @@
 
 #include "base/stl_util.h"
 #include "components/usb_service/usb_context.h"
-#include "components/usb_service/usb_device_handle.h"
+#include "components/usb_service/usb_device_handle_impl.h"
 #include "components/usb_service/usb_interface_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/libusb/src/libusb/libusb.h"
@@ -98,8 +98,8 @@ scoped_refptr<UsbDeviceHandle> UsbDeviceImpl::Open() {
     scoped_refptr<UsbConfigDescriptor> interfaces = ListInterfaces();
     if (!interfaces)
       return NULL;
-    scoped_refptr<UsbDeviceHandle> device_handle =
-        new UsbDeviceHandle(context_, this, handle, interfaces);
+    scoped_refptr<UsbDeviceHandleImpl> device_handle =
+        new UsbDeviceHandleImpl(context_, this, handle, interfaces);
     handles_.push_back(device_handle);
     return device_handle;
   }
@@ -136,12 +136,8 @@ void UsbDeviceImpl::OnDisconnect() {
   DCHECK(thread_checker_.CalledOnValidThread());
   HandlesVector handles;
   swap(handles, handles_);
-  for (std::vector<scoped_refptr<UsbDeviceHandle> >::iterator it =
-           handles.begin();
-       it != handles.end();
-       ++it) {
+  for (HandlesVector::iterator it = handles.begin(); it != handles.end(); ++it)
     (*it)->InternalClose();
-  }
 }
 
 }  // namespace usb_service