Add new API function: feedbackPrivate.readLogSource

chrome/browser/extensions/api/feedback_private/log_source_resource.h

+// Copyright 2017 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_EXTENSIONS_API_FEEDBACK_PRIVATE_LOG_SOURCE_RESOURCE_H_
+#define CHROME_BROWSER_EXTENSIONS_API_FEEDBACK_PRIVATE_LOG_SOURCE_RESOURCE_H_
+
+#include <memory>
+
+#include "base/callback_helpers.h"
+#include "base/macros.h"
+#include "chrome/browser/chromeos/system_logs/single_log_source.h"
+#include "chrome/browser/extensions/api/feedback_private/log_source_access_manager.h"
+#include "extensions/browser/api/api_resource.h"
+#include "extensions/browser/api/api_resource_manager.h"
+
+namespace extensions {
+
+// Holds a SingleLogSource object that is used by an extension using the
+// feedbackPrivate API.
+class LogSourceResource : public ApiResource {
+ public:
+  static const content::BrowserThread::ID kThreadId =
+      content::BrowserThread::UI;
+
+  LogSourceResource(const std::string& extension_id,
+                    std::unique_ptr<system_logs::SingleLogSource> source,
+                    base::Closure unregister_callback_);
+
+  ~LogSourceResource() override;
+
+  system_logs::SingleLogSource* GetLogSource() const { return source_.get(); }
+
+ private:
+  friend class ApiResourceManager<LogSourceResource>;
+  static const char* service_name() { return "LogSourceResource"; }
+
+  std::unique_ptr<system_logs::SingleLogSource> source_;
+
+  // This unregisters the LogSourceResource from a LogSourceAccessManager when
+  // this resource is cleaned up. Just pass in a base::Closure to the
+  // constructor.
+  base::ScopedClosureRunner unregister_runner_;
+
+  DISALLOW_COPY_AND_ASSIGN(LogSourceResource);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_FEEDBACK_PRIVATE_LOG_SOURCE_RESOURCE_H_