Implement chrome://blob-internals with network service.

storage/browser/blob/view_blob_internals_job.h

 // 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.
 
 #ifndef STORAGE_BROWSER_BLOB_VIEW_BLOB_INTERNALS_JOB_H_
 #define STORAGE_BROWSER_BLOB_VIEW_BLOB_INTERNALS_JOB_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 20 matching lines @@
                        BlobStorageContext* blob_storage_context);
 
   void Start() override;
   int GetData(std::string* mime_type,
               std::string* charset,
               std::string* data,
               const net::CompletionCallback& callback) const override;
   bool IsRedirectResponse(GURL* location, int* http_status_code) override;
   void Kill() override;
 
+  static std::string GenerateHTML(BlobStorageContext* blob_storage_context);
+
  private:
   ~ViewBlobInternalsJob() override;
 
-  void GenerateHTML(std::string* out) const;
   static void GenerateHTMLForBlobData(const BlobEntry& blob_data,
                                       const std::string& content_type,
                                       const std::string& content_disposition,
                                       int refcount,
                                       std::string* out);
 
   BlobStorageContext* blob_storage_context_;
   base::WeakPtrFactory<ViewBlobInternalsJob> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ViewBlobInternalsJob);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_BLOB_VIEW_BLOB_INTERNALS_JOB_H_