Componentize component_updater: Move over a bunch of files to the component.

chrome/browser/component_updater/component_patcher.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.
-
-// Component updates can be either differential updates or full updates.
-// Full updates come in CRX format; differential updates come in CRX-style
-// archives, but have a different magic number. They contain "commands.json", a
-// list of commands for the patcher to follow. The patcher uses these commands,
-// the other files in the archive, and the files from the existing installation
-// of the component to create the contents of a full update, which is then
-// installed normally.
-// Component updates are specified by the 'codebasediff' attribute of an
-// updatecheck response:
-//   <updatecheck codebase="http://example.com/extension_1.2.3.4.crx"
-//                hash="12345" size="9854" status="ok" version="1.2.3.4"
-//                prodversionmin="2.0.143.0"
-//                codebasediff="http://example.com/diff_1.2.3.4.crx"
-//                hashdiff="123" sizediff="101"
-//                fp="1.123" />
-// The component updater will attempt a differential update if it is available
-// and allowed to, and fall back to a full update if it fails.
-//
-// After installation (diff or full), the component updater records "fp", the
-// fingerprint of the installed files, to later identify the existing files to
-// the server so that a proper differential update can be provided next cycle.
-
-#ifndef CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_H_
-#define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_H_
-
-#include "base/callback_forward.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/values.h"
-#include "chrome/browser/component_updater/component_unpacker.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace component_updater {
-
-class ComponentInstaller;
-class DeltaUpdateOp;
-class OutOfProcessPatcher;
-
-// The type of a patch file.
-enum PatchType {
-  kPatchTypeUnknown,
-  kPatchTypeCourgette,
-  kPatchTypeBsdiff,
-};
-
-// Encapsulates a task for applying a differential update to a component.
-class ComponentPatcher : public base::RefCountedThreadSafe<ComponentPatcher> {
- public:
-  // Takes an unpacked differential CRX (|input_dir|) and a component installer,
-  // and sets up the class to create a new (non-differential) unpacked CRX.
-  // If |in_process| is true, patching will be done completely within the
-  // existing process. Otherwise, some steps of patching may be done
-  // out-of-process.
-  ComponentPatcher(const base::FilePath& input_dir,
-                   const base::FilePath& unpack_dir,
-                   ComponentInstaller* installer,
-                   scoped_refptr<OutOfProcessPatcher> out_of_process_patcher,
-                   scoped_refptr<base::SequencedTaskRunner> task_runner);
-
-  // Starts patching files. This member function returns immediately, after
-  // posting a task to do the patching. When patching has been completed,
-  // |callback| will be called with the error codes if any error codes were
-  // encountered.
-  void Start(const ComponentUnpacker::Callback& callback);
-
- private:
-  friend class base::RefCountedThreadSafe<ComponentPatcher>;
-
-  virtual ~ComponentPatcher();
-
-  void StartPatching();
-
-  void PatchNextFile();
-
-  void DonePatchingFile(ComponentUnpacker::Error error, int extended_error);
-
-  void DonePatching(ComponentUnpacker::Error error, int extended_error);
-
-  const base::FilePath input_dir_;
-  const base::FilePath unpack_dir_;
-  ComponentInstaller* const installer_;
-  scoped_refptr<OutOfProcessPatcher> out_of_process_patcher_;
-  ComponentUnpacker::Callback callback_;
-  scoped_ptr<base::ListValue> commands_;
-  base::ValueVector::const_iterator next_command_;
-  scoped_refptr<DeltaUpdateOp> current_operation_;
-  scoped_refptr<base::SequencedTaskRunner> task_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(ComponentPatcher);
-};
-
-}  // namespace component_updater
-
-#endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_H_