gn: Generalize process_version() and move it to build/util (take #2)

chrome/installer/setup/BUILD.gn

Index: chrome/installer/setup/BUILD.gn
diff --git a/chrome/installer/setup/BUILD.gn b/chrome/installer/setup/BUILD.gn
index 8c92d2189da6bcdbc76860ed9268746026343e91..5ef4cade03ae32531df287e89fb60ab62cbc1da6 100644
--- a/chrome/installer/setup/BUILD.gn
+++ b/chrome/installer/setup/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")
 
 if (is_win) {
@@ -78,7 +78,7 @@ if (is_win) {
     ]
   }
 
-  process_version("setup_exe_version") {
+  process_version_rc_template("setup_exe_version") {
     template_file = "setup_exe_version.rc.version"
     output = "$target_gen_dir/setup_exe_version.rc"
   }