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

components/version_info/BUILD.gn

Index: components/version_info/BUILD.gn
diff --git a/components/version_info/BUILD.gn b/components/version_info/BUILD.gn
index 7e0281a285c6b3c808fd910ec406bb86484da684..91375f95778ed74b380946b4279aec021fa5bacf 100644
--- a/components/version_info/BUILD.gn
+++ b/components/version_info/BUILD.gn
@@ -3,7 +3,7 @@
 # found in the LICENSE file.
 
 import("//build/config/chrome_build.gni")
-import("//chrome/version.gni")
+import("//build/util/process_version.gni")
 
 declare_args() {
   use_unofficial_version_number = !is_chrome_branded
@@ -29,5 +29,10 @@ static_library("version_info") {
 
 process_version("generate_version_info") {
   template_file = "version_info_values.h.version"
+  sources = [
+    "//build/util/LASTCHANGE",
+    "//chrome/VERSION",
+    branding_file_path,
+  ]
   output = "$target_gen_dir/version_info_values.h"
 }