GN: Remove "outputs" parameter for java_cpp_enum()

media/base/android/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//build/config/arm.gni")
 import("//build/config/ui.gni")
 import("//media/media_options.gni")
 
@@ skipping 108 matching lines @@
     "java/src/org/chromium/media/VideoCaptureFactory.java",
   ]
   jni_package = "media"
 }
 
 java_cpp_enum("media_java_enums_srcjar") {
   sources = [
     "//media/capture/video/android/video_capture_device_android.h",
     "//media/capture/video/video_capture_device.h",
   ]
-  outputs = [
-    "org/chromium/media/AndroidImageFormat.java",
-    "org/chromium/media/CaptureApiType.java",
-  ]
 }
 
 android_library("media_java") {
   deps = [
     "//base:base_java",
   ]
 
   srcjar_deps = [ ":media_java_enums_srcjar" ]
 
   DEPRECATED_java_in_dir = "java/src"
 }