[Extensions] DCHECK that ExtensionFunctions respond (and only once)

chrome/browser/chromeos/extensions/wallpaper_private_api.h

 // Copyright (c) 2012 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_CHROMEOS_EXTENSIONS_WALLPAPER_PRIVATE_API_H_
 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_PRIVATE_API_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 176 matching lines @@
   WallpaperPrivateSetCustomWallpaperLayoutFunction();
 
  protected:
   ~WallpaperPrivateSetCustomWallpaperLayoutFunction() override;
 
   // AsyncExtensionFunction overrides.
   bool RunAsync() override;
 };
 
 class WallpaperPrivateMinimizeInactiveWindowsFunction
-    : public AsyncExtensionFunction {
+    : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("wallpaperPrivate.minimizeInactiveWindows",
                              WALLPAPERPRIVATE_MINIMIZEINACTIVEWINDOWS)
 
   WallpaperPrivateMinimizeInactiveWindowsFunction();
 
  protected:
   ~WallpaperPrivateMinimizeInactiveWindowsFunction() override;
-
-  // AsyncExtensionFunction overrides.
-  bool RunAsync() override;
+  ResponseAction Run() override;
 };
 
 class WallpaperPrivateRestoreMinimizedWindowsFunction
-    : public AsyncExtensionFunction {
+    : public UIThreadExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("wallpaperPrivate.restoreMinimizedWindows",
                              WALLPAPERPRIVATE_RESTOREMINIMIZEDWINDOWS)
 
   WallpaperPrivateRestoreMinimizedWindowsFunction();
 
  protected:
   ~WallpaperPrivateRestoreMinimizedWindowsFunction() override;
-
-  // AsyncExtensionFunction overrides.
-  bool RunAsync() override;
+  ResponseAction Run() override;
 };
 
 class WallpaperPrivateGetThumbnailFunction : public AsyncExtensionFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("wallpaperPrivate.getThumbnail",
                              WALLPAPERPRIVATE_GETTHUMBNAIL)
 
   WallpaperPrivateGetThumbnailFunction();
 
  protected:
@@ skipping 85 matching lines @@
                              WALLPAPERPRIVATE_RECORDWALLPAPERUMA)
 
  protected:
   ~WallpaperPrivateRecordWallpaperUMAFunction() override {}
 
   // SyncExtensionFunction overrides.
   bool RunSync() override;
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_WALLPAPER_PRIVATE_API_H_