Mojo JS bindings: specify compress="gzip" for bindings JS files in .grd.

content/browser/webui/shared_resources_data_source.cc

 // Copyright (c) 2012 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.
 
 #include "content/browser/webui/shared_resources_data_source.h"
 
 #include <stddef.h>
 
 #include "base/containers/hash_tables.h"
 #include "base/files/file_path.h"
@@ skipping 178 matching lines @@
   // back.
   std::string allowed_origin_prefix = kChromeUIScheme;
   allowed_origin_prefix += "://";
   if (!base::StartsWith(origin, allowed_origin_prefix,
                         base::CompareCase::SENSITIVE)) {
     return "null";
   }
   return origin;
 }
 
+bool SharedResourcesDataSource::IsGzipped(const std::string& path) const {
+  return path == "js/mojo_bindings.js";
+}
+
 }  // namespace content