Remove some usages of AsyncExtensionFunction::results_.

extensions/browser/api/system_storage/system_storage_api.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.
 
 #ifndef EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_SYSTEM_STORAGE_API_H_
 #define EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_SYSTEM_STORAGE_API_H_
 
 #include "components/storage_monitor/storage_monitor.h"
 #include "extensions/browser/api/system_storage/storage_info_provider.h"
 #include "extensions/browser/extension_function.h"
 
 namespace extensions {
 
 // Implementation of the systeminfo.storage.get API. It is an asynchronous
 // call relative to browser UI thread.
-class SystemStorageGetInfoFunction : public AsyncExtensionFunction {
+class SystemStorageGetInfoFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("system.storage.getInfo", SYSTEM_STORAGE_GETINFO);
   SystemStorageGetInfoFunction();
 
  private:
   ~SystemStorageGetInfoFunction() override;
-  bool RunAsync() override;
+
+  // ExtensionFunction:
+  ResponseAction Run() override;
 
   void OnGetStorageInfoCompleted(bool success);
 };
 
-class SystemStorageEjectDeviceFunction : public AsyncExtensionFunction {
+class SystemStorageEjectDeviceFunction : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("system.storage.ejectDevice",
                              SYSTEM_STORAGE_EJECTDEVICE);
 
  protected:
   ~SystemStorageEjectDeviceFunction() override;
 
-  // AsyncExtensionFunction overrides.
-  bool RunAsync() override;
+  // ExtensionFunction:
+  ResponseAction Run() override;
 
  private:
   void OnStorageMonitorInit(const std::string& transient_device_id);
 
   // Eject device request handler.
   void HandleResponse(storage_monitor::StorageMonitor::EjectStatus status);
 };
 
 class SystemStorageGetAvailableCapacityFunction
-    : public AsyncExtensionFunction {
+    : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("system.storage.getAvailableCapacity",
                              SYSTEM_STORAGE_GETAVAILABLECAPACITY);
   SystemStorageGetAvailableCapacityFunction();
 
  private:
   void OnStorageMonitorInit(const std::string& transient_id);
   void OnQueryCompleted(const std::string& transient_id,
                         double available_capacity);
   ~SystemStorageGetAvailableCapacityFunction() override;
-  bool RunAsync() override;
+
+  // ExtensionFunction:
+  ResponseAction Run() override;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_SYSTEM_STORAGE_SYSTEM_STORAGE_API_H_