Construct USB descriptors over explicit values.

device/usb/usb_device_android.cc

Index: device/usb/usb_device_android.cc
diff --git a/device/usb/usb_device_android.cc b/device/usb/usb_device_android.cc
index ee9e93b8b7f1db6d2438ea19b3c686f3c976f4e0..6d246ba8e5d310f90cca170ce3af7128bb28b522 100644
--- a/device/usb/usb_device_android.cc
+++ b/device/usb/usb_device_android.cc
@@ -83,11 +83,10 @@ UsbDeviceAndroid::UsbDeviceAndroid(JNIEnv* env,
   } else {
     // Pre-lollipop only the first configuration was supported. Build a basic
     // configuration out of the available interfaces.
-    UsbConfigDescriptor config;
-    config.configuration_value = 1;  // Reasonable guess.
-    config.self_powered = false;     // Arbitrary default.
-    config.remote_wakeup = false;    // Arbitrary default.
-    config.maximum_power = 0;        // Arbitrary default.
+    UsbConfigDescriptor config(1,      // Configuration value, reasonable guess.
+                               false,  // Self powered, arbitrary default.
+                               false,  // Remote wakeup, rbitrary default.
+                               0);     // Maximum power, aitrary default.
 
     ScopedJavaLocalRef<jobjectArray> interfaces =
         Java_ChromeUsbDevice_getInterfaces(env, wrapper.obj());