Files.app: Implement md5 hashing over file streams.

chrome/browser/chromeos/extensions/file_manager/private_api_file_system.h

 // Copyright 2013 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.
 //
 // This file provides file system related API functions.
 
 #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_FILE_SYSTEM_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_FILE_SYSTEM_H_
 
 #include <string>
@@ skipping 14 matching lines @@
 
 namespace file_manager {
 namespace util {
 struct EntryDefinition;
 typedef std::vector<EntryDefinition> EntryDefinitionList;
 }  // namespace util
 }  // namespace file_manager
 
 namespace drive {
 struct HashAndFilePath;
+namespace util {
+class FileStreamMd5Digester;
+}  // namespace util
 }  // namespace drive
 
 namespace extensions {
 
 // Implements the chrome.fileManagerPrivate.requestFileSystem method.
 class FileManagerPrivateRequestFileSystemFunction
     : public LoggedAsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("fileManagerPrivate.requestFileSystem",
                              FILEMANAGERPRIVATE_REQUESTFILESYSTEM)
@@ skipping 184 matching lines @@
   bool RunAsync() override;
 
  private:
   void RunAsyncAfterConvertFileDefinitionListToEntryDefinitionList(scoped_ptr<
       file_manager::util::EntryDefinitionList> entry_definition_list);
 };
 
 class FileManagerPrivateComputeChecksumFunction
     : public LoggedAsyncExtensionFunction {
  public:
+  FileManagerPrivateComputeChecksumFunction();
   DECLARE_EXTENSION_FUNCTION("fileManagerPrivate.computeChecksum",
                              FILEMANAGERPRIVATE_COMPUTECHECKSUM)
 
  protected:
-  ~FileManagerPrivateComputeChecksumFunction() override {}
+  ~FileManagerPrivateComputeChecksumFunction() override;
 
   // AsyncExtensionFunction overrides.
   bool RunAsync() override;
 
  private:
+  scoped_ptr<drive::util::FileStreamMd5Digester> digester_;
   void Respond(const std::string& hash);
 };
 
 // Implements the chrome.fileManagerPrivate.searchFilesByHashes method.
 class FileManagerPrivateSearchFilesByHashesFunction
     : public LoggedAsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("fileManagerPrivate.searchFilesByHashes",
                              FILEMANAGERPRIVATE_SEARCHFILESBYHASHES)
 
  protected:
   ~FileManagerPrivateSearchFilesByHashesFunction() override {}
 
  private:
   // AsyncExtensionFunction overrides.
   bool RunAsync() override;
 
   // Sends a response with |results| to the extension.
   void OnSearchByHashes(const std::set<std::string>& hashes,
                         drive::FileError error,
                         const std::vector<drive::HashAndFilePath>& results);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_FILE_SYSTEM_H_