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

chrome/installer/gcapi/BUILD.gn

Index: chrome/installer/gcapi/BUILD.gn
diff --git a/chrome/installer/gcapi/BUILD.gn b/chrome/installer/gcapi/BUILD.gn
index f8bad02b44ec6add4fc264d89c04c71684b27a54..966290e5cccd465bb42091b6b8bf2a2add35385f 100644
--- a/chrome/installer/gcapi/BUILD.gn
+++ b/chrome/installer/gcapi/BUILD.gn
@@ -2,7 +2,7 @@
 # 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("//chrome/process_version_rc_template.gni")
 import("//testing/test.gni")
 
 assert(is_win)
@@ -34,7 +34,7 @@ copy("copy_gcapi_header") {
   ]
 }
 
-process_version("gcapi_dll_version") {
+process_version_rc_template("gcapi_dll_version") {
   template_file = "gcapi_dll_version.rc.version"
   output = "$target_gen_dir/gcapi_dll_version.rc"
 }