diff --git a/BUILD.gn b/BUILD.gn
index 7c658b9160..b99b3bcd48 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1487,7 +1487,7 @@ action("generate_devtools_grd") {
   ]
 
   grd_files =
-      all_devtools_modules + generated_applications +
+      copied_devtools_modules + generated_applications +
       generated_non_autostart_non_remote_modules + devtools_embedder_scripts +
       [ "$resources_out_dir/devtools_extension_api.js" ]
 
diff --git a/scripts/build/copy_devtools_modules.py b/scripts/build/copy_devtools_modules.py
index 10d9ee2352..a04b9e6525 100755
--- a/scripts/build/copy_devtools_modules.py
+++ b/scripts/build/copy_devtools_modules.py
@@ -12,6 +12,10 @@ from os.path import join, relpath
 import shutil
 import sys
 
+import rjsmin
+
+from modular_build import read_file, write_file
+
 
 def main(argv):
     try:
@@ -21,11 +25,13 @@ def main(argv):
         output_path = argv[output_path_flag_index + 1]
         devtools_modules = argv[1:input_path_flag_index]
     except:
-        print 'Usage: %s module_1 module_2 ... module_N --input_path <input_path> --output_path <output_path>' % argv[0]
+        print('Usage: %s module_1 module_2 ... module_N --input_path <input_path> --output_path <output_path>' % argv[0])
         raise
 
     for file_name in devtools_modules:
-        shutil.copy(join(input_path, file_name), join(output_path, relpath(file_name, 'front_end')))
+        file_content = read_file(join(input_path, file_name))
+        minified = rjsmin.jsmin(file_content)
+        write_file(join(output_path, relpath(file_name, 'front_end')), minified)
 
 
 if __name__ == '__main__':