Add content_shell_apk target (and a bunch of its dependencies)

build/config/android/internal_rules.gni

 # 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")
 
 assert(is_android)
 
 
 rebased_android_sdk = rebase_path(android_sdk, root_build_dir)
@@ skipping 501 matching lines @@
   assert(defined(invoker.build_config))
   assert(defined(invoker.jar_path))
   assert(defined(invoker.dex_path))
 
   _java_files = []
   if (defined(invoker.java_files)) {
     _java_files = invoker.java_files
   } else {
     _java_files_build_rel = exec_script(
         "//build/android/gyp/find.py",
-        ["--pattern", "*.java", rebase_path(invoker.DEPRECATED_java_in_dir, root_build_dir)],
+        [
+          "--pattern",
+          "*.java",
+          rebase_path(invoker.DEPRECATED_java_in_dir, root_build_dir)
+        ],
         "list lines"
         )
     _java_files = rebase_path(_java_files_build_rel, ".", root_build_dir)
   }
 
   _jar_path = invoker.jar_path
   _dex_path = invoker.dex_path
 
   _android_manifest = "//build/android/AndroidManifest.xml"
   if (defined(invoker.android_manifest)) {
@@ skipping 138 matching lines @@
       "--dest", rebase_path(invoker.dest, root_build_dir),
     ]
     if (defined(invoker.args)) {
       args += invoker.args
     }
     if (defined(invoker.clear_dir) && invoker.clear_dir) {
       args += ["--clear"]
     }
   }
 }