Remove DownloadProcessService code path

content/public/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")
 
 android_aidl("common_aidl") {
   interface_file = "java/src/org/chromium/content/common/common.aidl"
   import_include = "java/src"
@@ skipping 56 matching lines @@
     "//ui/touch_selection:ui_touch_selection_enums_srcjar",
     "//ui/touch_selection:ui_touch_handle_orientation_srcjar",
   ]
 
   java_files = [
     "java/src/org/chromium/content/app/ChildProcessService.java",
     "java/src/org/chromium/content/app/ChildProcessServiceImpl.java",
     "java/src/org/chromium/content/app/ChromiumLinkerParams.java",
     "java/src/org/chromium/content/app/ContentApplication.java",
     "java/src/org/chromium/content/app/ContentMain.java",
-    "java/src/org/chromium/content/app/DownloadProcessService.java",
     "java/src/org/chromium/content/app/PrivilegedProcessService.java",
     "java/src/org/chromium/content/app/PrivilegedProcessService0.java",
     "java/src/org/chromium/content/app/PrivilegedProcessService1.java",
     "java/src/org/chromium/content/app/PrivilegedProcessService2.java",
     "java/src/org/chromium/content/app/SandboxedProcessService.java",
     "java/src/org/chromium/content/app/SandboxedProcessService0.java",
     "java/src/org/chromium/content/app/SandboxedProcessService1.java",
     "java/src/org/chromium/content/app/SandboxedProcessService10.java",
     "java/src/org/chromium/content/app/SandboxedProcessService11.java",
     "java/src/org/chromium/content/app/SandboxedProcessService12.java",
@@ skipping 339 matching lines @@
     "junit/src/org/chromium/content/browser/input/ThreadedInputConnectionFactoryTest.java",
     "junit/src/org/chromium/content/browser/input/ThreadedInputConnectionTest.java",
     "junit/src/org/chromium/content/browser/BindingManagerImplTest.java",
   ]
   deps = [
     ":content_java",
     "//base:base_java",
     "//base:base_java_test_support",
   ]
 }