Reset interface state when USBDevice.close is called.

Closing the device releases all interfaces so this state must be reset.

BUG=665592

Review-Url: https://codereview.chromium.org/2535163003
Cr-Commit-Position: refs/heads/master@{#435406}

third_party/WebKit/LayoutTests/usb/usbDevice.html

@@ -231,11 +231,35 @@
     return device.open()
       .then(() => device.selectConfiguration(1))
       .then(() => device.claimInterface(0))
-      .then(() => device.releaseInterface(0))
-      .then(() => device.close());
+      .then(() => {
+        assert_true(device.configuration.interfaces[0].claimed);
+        return device.releaseInterface(0);
+      })
+      .then(() => {
+        assert_false(device.configuration.interfaces[0].claimed);
+        return device.close();
+      });
   });
 }, 'an interface can be claimed and released');
 
+usb_test(usb => {
+  usb.mockDeviceManager.addMockDevice(usb.fakeDevices[0]);
+  return navigator.usb.getDevices().then(devices => {
+    assert_equals(1, devices.length);
+    let device = devices[0];
+    return device.open()
+      .then(() => device.selectConfiguration(1))
+      .then(() => device.claimInterface(0))
+      .then(() => {
+        assert_true(device.configuration.interfaces[0].claimed);
+        return device.close(0);
+      })
+      .then(() => {
+        assert_false(device.configuration.interfaces[0].claimed);
+      });
+  });
+}, 'interfaces are released on close');
+
 usb_test(usb => {
   usb.mockDeviceManager.addMockDevice(usb.fakeDevices[0]);
   return navigator.usb.getDevices().then(devices => {

third_party/WebKit/Source/modules/webusb/USBDevice.cpp

@@ -718,6 +718,12 @@ void USBDevice::asyncClose(ScriptPromiseResolver* resolver) {
 
 void USBDevice::onDeviceOpenedOrClosed(bool opened) {
   m_opened = opened;
+  if (!m_opened) {
+    m_claimedInterfaces.clearAll();
+    m_selectedAlternates.fill(0);
+    m_inEndpoints.clearAll();
+    m_outEndpoints.clearAll();
+  }
   m_deviceStateChangeInProgress = false;
 }