Strip comments and whitespace from Javascript resources

third_party/closure_compiler/closure_args.gni

Index: third_party/closure_compiler/closure_args.gni
diff --git a/third_party/closure_compiler/closure_args.gni b/third_party/closure_compiler/closure_args.gni
index b1cd18974247bb1e587e661eecd99c629468a76d..569b21581ece79f6717552def35b514d2bd23303 100644
--- a/third_party/closure_compiler/closure_args.gni
+++ b/third_party/closure_compiler/closure_args.gni
@@ -3,9 +3,7 @@
 # found in the LICENSE file.
 
 # GYP version: third_party/closure_compiler/closure_args.gypi
-closure_args = [
-  "compilation_level=SIMPLE_OPTIMIZATIONS",
-
+common_closure_args = [
   "extra_annotation_name=attribute",
   "extra_annotation_name=demo",
   "extra_annotation_name=element",
@@ -14,7 +12,15 @@ closure_args = [
   "extra_annotation_name=homepage",
   "extra_annotation_name=status",
   "extra_annotation_name=submodule",
+  "language_in=ECMASCRIPT6_STRICT",
+  "language_out=ECMASCRIPT5_STRICT",
+
+  "polymer_pass",
+
+  "source_map_format=V3",
+]
 
+typecheck_closure_args = [
   "jscomp_error=accessControls",
   "jscomp_error=ambiguousFunctionDecl",
   "jscomp_error=checkTypes",
@@ -33,13 +39,6 @@ closure_args = [
   "jscomp_error=unknownDefines",
   "jscomp_error=uselessCode",
   "jscomp_error=visibility",
-
-  "language_in=ECMASCRIPT6_STRICT",
-  "language_out=ECMASCRIPT5_STRICT",
-
-  "polymer_pass",
-
-  "source_map_format=V3",
 ]
 
 default_disabled_closure_args = [