Optionally compute grit inputs precisely.

third_party/google_input_tools/closure.gni

Index: third_party/google_input_tools/closure.gni
diff --git a/third_party/google_input_tools/closure.gni b/third_party/google_input_tools/closure.gni
index 81f866581fa621fb089718e6a9a5c762c432ab0c..ea8fe8360f0c2bc10a3800b947aaa4ed73083f6c 100644
--- a/third_party/google_input_tools/closure.gni
+++ b/third_party/google_input_tools/closure.gni
@@ -5,8 +5,7 @@
 template("build_closure") {
   assert(defined(invoker.sources))
   assert(defined(invoker.target))
-  action_name = target_name + "_js_gen"
-  action(action_name) {
+  action(target_name) {
     script = "//third_party/google_input_tools/builder.py"
     sources = invoker.sources
     outputs = [
@@ -39,9 +38,4 @@ template("build_closure") {
       ]
     }
   }
-  group(target_name) {
-    deps = [
-      ":$action_name",
-    ]
-  }
 }