Revert of Implement basic USB device enumeration on Android.

device/usb/usb_service_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_service_android.h"
 
-#include <string>
-#include <vector>
-
-#include "base/android/context_utils.h"
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/thread_task_runner_handle.h"
-#include "device/usb/usb_device_android.h"
-#include "jni/ChromeUsbService_jni.h"
-
-using base::android::AttachCurrentThread;
-using base::android::ScopedJavaLocalRef;
+#include "device/usb/usb_device.h"
 
 namespace device {
 
-// static
-bool UsbServiceAndroid::RegisterJNI(JNIEnv* env) {
-  return RegisterNativesImpl(env);  // Generated in ChromeUsbService_jni.h
-}
-
-UsbServiceAndroid::UsbServiceAndroid() {
-  j_object_.Reset(Java_ChromeUsbService_create(
-      AttachCurrentThread(), base::android::GetApplicationContext()));
-}
+UsbServiceAndroid::UsbServiceAndroid() {}
 
 UsbServiceAndroid::~UsbServiceAndroid() {}
 
 scoped_refptr<UsbDevice> UsbServiceAndroid::GetDevice(const std::string& guid) {
   return nullptr;
 }
 
 void UsbServiceAndroid::GetDevices(const GetDevicesCallback& callback) {
-  JNIEnv* env = AttachCurrentThread();
-  ScopedJavaLocalRef<jobjectArray> devices =
-      Java_ChromeUsbService_getDevices(env, j_object_.obj());
-  jsize length = env->GetArrayLength(devices.obj());
-
-  std::vector<scoped_refptr<UsbDevice>> results;
-  for (jsize i = 0; i < length; ++i) {
-    ScopedJavaLocalRef<jobject> raw_device(
-        env, env->GetObjectArrayElement(devices.obj(), i));
-    results.push_back(UsbDeviceAndroid::Create(env, raw_device));
-  }
-
+  std::vector<scoped_refptr<UsbDevice>> empty;
   base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
-                                                base::Bind(callback, results));
+                                                base::Bind(callback, empty));
 }
 
 }  // namespace device