Remove header dependencies from sequence_checker.h to sequenced_worker_pool.h

device/usb/usb_device_android.h

 // 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.
 
 #ifndef DEVICE_USB_USB_DEVICE_ANDROID_H_
 #define DEVICE_USB_USB_DEVICE_ANDROID_H_
 
 #include "base/android/scoped_java_ref.h"
 #include "base/memory/weak_ptr.h"
 #include "device/usb/usb_device.h"
 
+namespace base {
+class SequencedTaskRunner;
+}
+
 namespace device {
 
 class UsbServiceAndroid;
 
 class UsbDeviceAndroid : public UsbDevice {
  public:
   static scoped_refptr<UsbDeviceAndroid> Create(
       JNIEnv* env,
       base::WeakPtr<UsbServiceAndroid> service,
       scoped_refptr<base::SequencedTaskRunner> blocking_task_runner,
@@ skipping 42 matching lines @@
   std::list<ResultCallback> request_permission_callbacks_;
   base::WeakPtr<UsbServiceAndroid> service_;
 
   // Java object org.chromium.device.usb.ChromeUsbDevice.
   base::android::ScopedJavaGlobalRef<jobject> j_object_;
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DEVICE_ANDROID_H_