[usbfs] Refresh endpoints on SetInterface

Change-Id: I69b7908d041c85e0265ec8277887ea00ea5cd463
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2220626
Commit-Queue: Bruno Dal Bo <brunodalbo@google.com>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#773799}

services/device/usb/usb_device_handle_usbfs.cc

@@ -291,8 +291,12 @@ void UsbDeviceHandleUsbfs::BlockingTaskRunnerHelper::SetInterface(
     USB_PLOG(DEBUG) << "Failed to set interface " << interface_number
                     << " to alternate setting " << alternate_setting;
   }
-  task_runner_->PostTask(FROM_HERE,
-                         base::BindOnce(std::move(callback), rc == 0));
+  task_runner_->PostTask(
+      FROM_HERE,
+      base::BindOnce(
+          &UsbDeviceHandleUsbfs::SetAlternateInterfaceSettingComplete,
+          device_handle_, interface_number, alternate_setting, rc == 0,
+          std::move(callback)));
 }
 
 void UsbDeviceHandleUsbfs::BlockingTaskRunnerHelper::ResetDevice(
@@ -763,6 +767,19 @@ void UsbDeviceHandleUsbfs::SetConfigurationComplete(int configuration_value,
   std::move(callback).Run(success);
 }
 
+void UsbDeviceHandleUsbfs::SetAlternateInterfaceSettingComplete(
+    int interface_number,
+    int alternate_setting,
+    bool success,
+    ResultCallback callback) {
+  DCHECK(sequence_checker_.CalledOnValidSequence());
+  if (success && device_) {
+    interfaces_[interface_number].alternate_setting = alternate_setting;
+    RefreshEndpointInfo();
+  }
+  std::move(callback).Run(success);
+}
+
 void UsbDeviceHandleUsbfs::ReleaseInterfaceComplete(int interface_number,
                                                     ResultCallback callback) {
   DCHECK(sequence_checker_.CalledOnValidSequence());

services/device/usb/usb_device_handle_usbfs.h

@@ -103,6 +103,10 @@ class UsbDeviceHandleUsbfs : public UsbDeviceHandle {
   void SetConfigurationComplete(int configuration_value,
                                 bool success,
                                 ResultCallback callback);
+  void SetAlternateInterfaceSettingComplete(int interface_number,
+                                            int alternate_setting,
+                                            bool success,
+                                            ResultCallback callback);
   void ReleaseInterfaceComplete(int interface_number, ResultCallback callback);
   void IsochronousTransferInternal(uint8_t endpoint_address,
                                    scoped_refptr<base::RefCountedBytes> buffer,