Strip comments and whitespace from javascript resources

tools/grit/grit/format/minifier.py

Index: tools/grit/grit/format/minifier.py
diff --git a/tools/grit/grit/format/minifier.py b/tools/grit/grit/format/minifier.py
new file mode 100644
index 0000000000000000000000000000000000000000..a451b2a9ec4afb646a7f5db88417176ef4da63cf
--- /dev/null
+++ b/tools/grit/grit/format/minifier.py
@@ -0,0 +1,32 @@
+# Copyright (c) 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+'''Framework for stripping whitespace and comments from resource files'''
+
+import re
+import subprocess
+
+__js_minifier = None
+
+def SetJsMinifier(minifier):
+  global __js_minifier
+  __js_minifier = minifier.split()
+
+
+def Minify(source, file_type):
+  if file_type == '.js' and __js_minifier:
+    p = subprocess.Popen(__js_minifier,
+                         stdin=subprocess.PIPE,
+                         stdout=subprocess.PIPE,
+                         stderr=subprocess.PIPE)
+    (stdout,stderr) = p.communicate(source)
+    if stderr:
+      print stderr
+    if p.returncode != 0:
+      print "Minification failed, using original source"
+      return source
+    return stdout
+  else:
+    return source
+