Remove now-unnecessary .obj() in Java method calls.

device/usb/usb_device_handle_android.cc

Index: device/usb/usb_device_handle_android.cc
diff --git a/device/usb/usb_device_handle_android.cc b/device/usb/usb_device_handle_android.cc
index 5041f60a3ed7ab01f693af5c16ddf4ed08f7555b..e2e0dc03d8916f15dced5183d73b0d485be5a23f 100644
--- a/device/usb/usb_device_handle_android.cc
+++ b/device/usb/usb_device_handle_android.cc
@@ -20,9 +20,8 @@ scoped_refptr<UsbDeviceHandleAndroid> UsbDeviceHandleAndroid::Create(
     scoped_refptr<base::SequencedTaskRunner> blocking_task_runner,
     const base::android::JavaRef<jobject>& usb_connection) {
   ScopedJavaLocalRef<jobject> wrapper =
-      Java_ChromeUsbConnection_create(env, usb_connection.obj());
-  base::ScopedFD fd(
-      Java_ChromeUsbConnection_getFileDescriptor(env, wrapper.obj()));
+      Java_ChromeUsbConnection_create(env, usb_connection);
+  base::ScopedFD fd(Java_ChromeUsbConnection_getFileDescriptor(env, wrapper));
   return make_scoped_refptr(new UsbDeviceHandleAndroid(
       device, std::move(fd), blocking_task_runner, wrapper));
 }
@@ -45,7 +44,7 @@ void UsbDeviceHandleAndroid::CloseBlocking() {
 
 void UsbDeviceHandleAndroid::CloseConnection() {
   JNIEnv* env = base::android::AttachCurrentThread();
-  Java_ChromeUsbConnection_close(env, j_object_.obj());
+  Java_ChromeUsbConnection_close(env, j_object_);
   j_object_.Reset();
 }