gn: Generalize process_version() and move it to build/util

components/data_reduction_proxy/core/common/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("//chrome/version.gni")
+import("//build/util/process_version.gni")
 
 # Variables:
 #   deps: Extra dependencies.
 template("common_tmpl") {
   static_library(target_name) {
     sources = [
       "data_reduction_proxy_bypass_action_list.h",
       "data_reduction_proxy_bypass_type_list.h",
       "data_reduction_proxy_config_values.h",
       "data_reduction_proxy_event_creator.cc",
@@ skipping 87 matching lines @@
     "//components/data_reduction_proxy/core/browser",
     "//components/data_reduction_proxy/proto:data_reduction_proxy_proto",
     "//components/variations",
     "//net:test_support",
     "//testing/gtest",
   ]
 }
 
 process_version("version_header") {
   template_file = "version.h.in"
+  sources = [
+    "//chrome/VERSION",
+  ]
   output = "$target_gen_dir/version.h"
   extra_args = [
     "-e",
     "VERSION_FULL=\"%s.%s.%s.%s\" % (MAJOR,MINOR,BUILD,PATCH)",
   ]
 }