Componentize component_updater: Decouple in-process DeltaUpdateOp from out-of-process version.

chrome/browser/component_updater/component_patcher_operation_out_of_process.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_COMPONENT_UPDATER_UPDATE_CHECKER_H_
-#define CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_CHECKER_H_
+#ifndef CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_OUT_OF_PROCESS_H_
+#define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_OUT_OF_PROCESS_H_
 
 #include <string>
-#include <vector>
 
 #include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/component_updater/update_response.h"
-
-class GURL;
-
-namespace net {
-class URLRequestContextGetter;
-}
+#include "base/callback_forward.h"
+#include "chrome/browser/component_updater/component_patcher_operation.h"
 
 namespace component_updater {
 
-class Configurator;
-struct CrxUpdateItem;
+class PatchHost;
 
-class UpdateChecker {
+// Implements the DeltaUpdateOpPatch out-of-process patching.
+class ChromeOutOfProcessPatcher : public OutOfProcessPatcher {
  public:
-  typedef base::Callback<void(int error,
-                              const std::string& error_message,
-                              const UpdateResponse::Results& results)>
-      UpdateCheckCallback;
+  ChromeOutOfProcessPatcher();
 
-  virtual ~UpdateChecker() {}
-
-  // Initiates an update check for the |items_to_check|. |additional_attributes|
-  // provides a way to customize the <request> element. This value is inserted
-  // as-is, therefore it must be well-formed as an XML attribute string.
-  virtual bool CheckForUpdates(
-      const std::vector<CrxUpdateItem*>& items_to_check,
-      const std::string& additional_attributes) = 0;
-
-  static scoped_ptr<UpdateChecker> Create(
-      const Configurator& config,
-      const UpdateCheckCallback& update_check_callback);
-
- protected:
-  UpdateChecker() {}
+  // DeltaUpdateOpPatch::OutOfProcessPatcher implementation.
+  virtual void Patch(const std::string& operation,
+                     scoped_refptr<base::SequencedTaskRunner> task_runner,
+                     base::FilePath& input_abs_path,
+                     base::FilePath& patch_abs_path,
+                     base::FilePath& output_abs_path,
+                     base::Callback<void(int result)> callback) OVERRIDE;
 
  private:
-  DISALLOW_COPY_AND_ASSIGN(UpdateChecker);
+  virtual ~ChromeOutOfProcessPatcher();
+
+  scoped_refptr<PatchHost> host_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeOutOfProcessPatcher);
 };
 
 }  // namespace component_updater
 
-#endif  // CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_CHECKER_H_
+#endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_PATCHER_OPERATION_OUT_OF_PROCESS_H_