Migrate all usages of xxd.py to blink_resources.grd and remove xxd.py - Part 3

Source/build/convert_file_to_header_with_character_array.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.
-
-# To use this:
-#  convert_file_to_header_with_character_array("mytarget") {
-#    input_file_path = "myfile.js"
-#    output_file_path = "$root_gen_dir/blink/myfile.h"
-#    character_array_name = "myfile_js"
-#  }
-template("convert_file_to_header_with_character_array") {
-  assert(defined(invoker.input_file_path), "Need input_file_path.")
-  assert(defined(invoker.output_file_path), "Need output_file_path.")
-  assert(defined(invoker.character_array_name), "Need character_array_name.")
-
-  action(target_name) {
-    script = "//third_party/WebKit/Source/build/scripts/xxd.py"
-
-    inputs = [ invoker.input_file_path ]
-    outputs = [ invoker.output_file_path ]
-
-    args = [
-      invoker.character_array_name,
-      rebase_path(invoker.input_file_path, root_build_dir),
-      rebase_path(invoker.output_file_path, root_build_dir),
-    ]
-  }
-}