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..182cae96903a210c6e7248fe69c4153cd729fbed 100644
--- a/third_party/closure_compiler/closure_args.gni
+++ b/third_party/closure_compiler/closure_args.gni
@@ -3,8 +3,9 @@
 # found in the LICENSE file.
 
 # GYP version: third_party/closure_compiler/closure_args.gypi
-closure_args = [
-  "compilation_level=SIMPLE_OPTIMIZATIONS",
+
+# Args for all uses of the closure compiler
+common_closure_args = [
 
   "extra_annotation_name=attribute",
   "extra_annotation_name=demo",
@@ -15,6 +16,18 @@ closure_args = [
   "extra_annotation_name=status",
   "extra_annotation_name=submodule",
 
+  "language_in=ECMASCRIPT6_STRICT",
+  "language_out=ECMASCRIPT5_STRICT",
+
+  "polymer_pass",
+
+  "source_map_format=V3",
+]
+
+# Additional closure args for performing full checks. 
+checking_closure_args = [
+  "compilation_level=SIMPLE_OPTIMIZATIONS",
+
   "jscomp_error=accessControls",
   "jscomp_error=ambiguousFunctionDecl",
   "jscomp_error=checkTypes",
@@ -33,15 +46,11 @@ 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",
 ]
 
+# For compatibility with old uses.
+closure_args = common_closure_args + checking_closure_args
+
 default_disabled_closure_args = [
   "jscomp_off=duplicate",
   "jscomp_off=misplacedTypeAnnotation",