Componentize parts of minidump uploading for use from WebView.

components/minidump_uploader/BUILD.gn

 # Copyright 2016 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/rules.gni")
 
-assert(is_android)
-
-android_library("android_async_task_java") {
-  java_files = [ "java/src/org/chromium/third_party/android/os/AsyncTask.java" ]
+android_library("minidump_uploader_java") {
   deps = [
     "//base:base_java",
     "//third_party/android_tools:android_support_annotations_java",
   ]
-  chromium_code = false
+
+  java_files = [
+    "android/java/src/org/chromium/components/minidump_uploader/util/HttpURLConnectionFactory.java",
+    "android/java/src/org/chromium/components/minidump_uploader/util/HttpURLConnectionFactoryImpl.java",
+  ]
 }