Check Android version before calling UsbInterface.getAlternateSetting()

device/usb/usb_interface_android.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/usb/usb_interface_android.h"
 
+#include "base/android/build_info.h"
 #include "device/usb/usb_endpoint_android.h"
 #include "jni/ChromeUsbInterface_jni.h"
 
 using base::android::ScopedJavaLocalRef;
 
 namespace device {
 
 // static
 bool UsbInterfaceAndroid::RegisterJNI(JNIEnv* env) {
   return RegisterNativesImpl(env);  // Generated in ChromeUsbInterface_jni.h
 }
 
 // static
 UsbInterfaceDescriptor UsbInterfaceAndroid::Convert(
     JNIEnv* env,
     const base::android::JavaRef<jobject>& usb_interface) {
   ScopedJavaLocalRef<jobject> wrapper =
       Java_ChromeUsbInterface_create(env, usb_interface.obj());
 
+  uint8_t alternate_setting = 0;
+  if (base::android::BuildInfo::GetInstance()->sdk_int() >= 21) {
+    alternate_setting =
+        Java_ChromeUsbInterface_getAlternateSetting(env, wrapper.obj());
+  }
+
   UsbInterfaceDescriptor interface(
       Java_ChromeUsbInterface_getInterfaceNumber(env, wrapper.obj()),
-      Java_ChromeUsbInterface_getAlternateSetting(env, wrapper.obj()),
+      alternate_setting,
       Java_ChromeUsbInterface_getInterfaceClass(env, wrapper.obj()),
       Java_ChromeUsbInterface_getInterfaceSubclass(env, wrapper.obj()),
       Java_ChromeUsbInterface_getInterfaceProtocol(env, wrapper.obj()));
 
   ScopedJavaLocalRef<jobjectArray> endpoints =
       Java_ChromeUsbInterface_getEndpoints(env, wrapper.obj());
   jsize count = env->GetArrayLength(endpoints.obj());
   interface.endpoints.reserve(count);
   for (jsize i = 0; i < count; ++i) {
     ScopedJavaLocalRef<jobject> endpoint(
         env, env->GetObjectArrayElement(endpoints.obj(), i));
     interface.endpoints.push_back(UsbEndpointAndroid::Convert(env, endpoint));
   }
 
   return interface;
 }
 
 }  // namespace device