Files.app: Stop to use file system URLs having externalfile:// scheme origin internally.

chrome/browser/chromeos/fileapi/external_file_url_request_job.h

 // Copyright 2014 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 CHROME_BROWSER_CHROMEOS_FILEAPI_EXTERNAL_FILE_URL_REQUEST_JOB_H_
 #define CHROME_BROWSER_CHROMEOS_FILEAPI_EXTERNAL_FILE_URL_REQUEST_JOB_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 11 matching lines @@
 class NetworkDelegate;
 class URLRequest;
 }  // namespace net
 
 namespace chromeos {
 
 // ExternalFileURLRequestJob is the gateway between network-level drive:...
 // requests for drive resources and FileSystem.  It exposes content URLs
 // formatted as drive:<drive-file-path>.
 // The methods should be run on IO thread.
+// TODO(hirono): After removing MHTML support, stop to use the special
+// externalfile: scheme and use filesystem: URL directly.  crbug.com/415455
 class ExternalFileURLRequestJob : public net::URLRequestJob {
  public:
+  // Scope of isolated file system.
+  class IsolatedFileSystemScope {
+   public:
+    explicit IsolatedFileSystemScope(const std::string& file_system_id);
+    ~IsolatedFileSystemScope();
+
+   private:
+    std::string file_system_id_;
+    DISALLOW_COPY_AND_ASSIGN(IsolatedFileSystemScope);
+  };
+
   // Callback to take results from an internal helper defined in
   // drive_url_request_job.cc.
-  typedef base::Callback<
-      void(net::Error,
-           const scoped_refptr<storage::FileSystemContext>& file_system_context,
-           const storage::FileSystemURL& file_system_url,
-           const std::string& mime_type)> HelperCallback;
+  typedef base::Callback<void(
+      net::Error,
+      const scoped_refptr<storage::FileSystemContext>& file_system_context,
+      scoped_ptr<IsolatedFileSystemScope> isolated_file_system_scope,
+      const storage::FileSystemURL& file_system_url,
+      const std::string& mime_type)> HelperCallback;
 
   ExternalFileURLRequestJob(void* profile_id,
                             net::URLRequest* request,
                             net::NetworkDelegate* network_delegate);
 
   // net::URLRequestJob overrides:
   virtual void SetExtraRequestHeaders(
       const net::HttpRequestHeaders& headers) OVERRIDE;
   virtual void Start() OVERRIDE;
   virtual void Kill() OVERRIDE;
   virtual bool GetMimeType(std::string* mime_type) const OVERRIDE;
   virtual bool IsRedirectResponse(GURL* location,
                                   int* http_status_code) OVERRIDE;
   virtual bool ReadRawData(net::IOBuffer* buf,
                            int buf_size,
                            int* bytes_read) OVERRIDE;
 
  protected:
   virtual ~ExternalFileURLRequestJob();
 
  private:
   // Called from an internal helper class defined in drive_url_request_job.cc,
   // which is running on the UI thread.
   void OnHelperResultObtained(
       net::Error error,
       const scoped_refptr<storage::FileSystemContext>& file_system_context,
+      scoped_ptr<IsolatedFileSystemScope> isolated_file_system_scope,
       const storage::FileSystemURL& file_system_url,
       const std::string& mime_type);
 
   // Called from FileSystemBackend::GetRedirectURLForContents.
   void OnRedirectURLObtained(const GURL& redirect_url);
 
   // Called from DriveURLRequestJob::OnFileInfoObtained.
   void OnFileInfoObtained(base::File::Error result,
                           const base::File::Info& file_info);
 
   // Called when DriveFileStreamReader::Read is completed.
   void OnReadCompleted(int read_result);
 
   void* const profile_id_;
 
   // The range of the file to be returned.
   net::HttpByteRange byte_range_;
   int64 remaining_bytes_;
 
   scoped_refptr<storage::FileSystemContext> file_system_context_;
+  scoped_ptr<IsolatedFileSystemScope> isolated_file_system_scope_;
   storage::FileSystemURL file_system_url_;
   std::string mime_type_;
   scoped_ptr<storage::FileStreamReader> stream_reader_;
   GURL redirect_url_;
 
   // This should remain the last member so it'll be destroyed first and
   // invalidate its weak pointers before other members are destroyed.
   base::WeakPtrFactory<ExternalFileURLRequestJob> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(ExternalFileURLRequestJob);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILEAPI_EXTERNAL_FILE_URL_REQUEST_JOB_H_