text: // 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 contains base classes for fileManagerPrivate API.
  
  #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_BASE_H_
  #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_BASE_H_
  
  #include "base/time/time.h"
  #include "chrome/browser/extensions/chrome_extension_function.h"
  
  namespace extensions {
  
  // This class adds a logging feature to AsyncExtensionFunction. Logging is
  // done when sending the response to JavaScript, using drive::util::Log().
  // Async API functions of fileManagerPrivate should inherit this class.
  //
  // By default, logging is turned off, hence sub classes should call
  // set_log_on_completion(true) to enable it, if they want. However, even if
  // the logging is turned off, a warning is emitted when a function call is
  // very slow. See the implementation of OnResponded() for details.
  class LoggedAsyncExtensionFunction : public ChromeAsyncExtensionFunction {
   public:
    LoggedAsyncExtensionFunction();
  
   protected:
    ~LoggedAsyncExtensionFunction() override;
  
    // AsyncExtensionFunction overrides.
    void OnResponded() override;
  
    // Sets the logging on completion flag. By default, logging is turned off.
    void set_log_on_completion(bool log_on_completion) {
      log_on_completion_ = log_on_completion;
    }
  
   private:
    base::Time start_time_;
    bool log_on_completion_;
  };
  
  }  // namespace extensions
  
  #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_FILE_MANAGER_PRIVATE_API_BASE_H_
  