ui/base and some other GN build

build/util/BUILD.gn

Index: build/util/BUILD.gn
diff --git a/build/util/BUILD.gn b/build/util/BUILD.gn
index 9c5cf78062741926a304dcb0152f2fecb1d0bbab..910900817365e2a173b7d678946803c5a9b516e9 100644
--- a/build/util/BUILD.gn
+++ b/build/util/BUILD.gn
@@ -13,7 +13,7 @@
 # All you need to do is depend on this target, and then from your source code:
 #  #include "build/util/last_change.h"
 action("last_change") {
-  script = "//build/util/lastchange.py"
+  script = "lastchange.py"
 
   # Rerun the script any time this file changes.
   source_prereqs = [ "//build/util/LASTCHANGE" ]
@@ -30,3 +30,21 @@ action("last_change") {
     "--version-macro=LAST_CHANGE",
   ]
 }
+
+action("webkit_version") {
+  script = "version.py"
+
+  lastchange_file = "LASTCHANGE.blink"
+  # TODO(brettw) move from content to this directory.
+  template_file = "//content/webkit_version.h.in"
+  source_prereqs = [ lastchange_file, template_file ]
+
+  output_file = "$root_gen_dir/webkit_version.h"
+  outputs = [ output_file ]
+
+  args = [
+    "-f", rebase_path(lastchange_file, root_build_dir),
+    rebase_path(template_file, root_build_dir),
+    rebase_path(output_file, root_build_dir),
+  ]
+}