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

content/browser/webui/shared_resources_data_source.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_BROWSER_WEBUI_SHARED_RESOURCES_DATA_SOURCE_H_
 #define CONTENT_BROWSER_WEBUI_SHARED_RESOURCES_DATA_SOURCE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 11 matching lines @@
   void StartDataRequest(
       const std::string& path,
       const ResourceRequestInfo::WebContentsGetter& wc_getter,
       const URLDataSource::GotDataCallback& callback) override;
   bool AllowCaching() const override;
   std::string GetMimeType(const std::string& path) const override;
   scoped_refptr<base::SingleThreadTaskRunner> TaskRunnerForRequestPath(
       const std::string& path) const override;
   std::string GetAccessControlAllowOriginForOrigin(
       const std::string& origin) const override;
+  bool IsGzipped(const std::string& path) const override;
 
  private:
   ~SharedResourcesDataSource() override;
 
   DISALLOW_COPY_AND_ASSIGN(SharedResourcesDataSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEBUI_SHARED_RESOURCES_DATA_SOURCE_H_