Drive extension functions from ExtensionFunction::Run. The

chrome/browser/extensions/api/file_system/file_system_api.h

Index: chrome/browser/extensions/api/file_system/file_system_api.h
diff --git a/chrome/browser/extensions/api/file_system/file_system_api.h b/chrome/browser/extensions/api/file_system/file_system_api.h
index a2a8c706df9c701bf37f607eb7e1fabb0eb19f70..7aee4e5c7797e52b85ef5d4267e29797c4c6ff52 100644
--- a/chrome/browser/extensions/api/file_system/file_system_api.h
+++ b/chrome/browser/extensions/api/file_system/file_system_api.h
@@ -88,7 +88,7 @@ class FileSystemGetWritableEntryFunction : public FileSystemEntryFunction {
 
  protected:
   virtual ~FileSystemGetWritableEntryFunction() {}
-  virtual bool RunImpl() OVERRIDE;
+  virtual bool RunAsync() OVERRIDE;
 
  private:
   void CheckPermissionAndSendResponse();
@@ -145,7 +145,7 @@ class FileSystemChooseEntryFunction : public FileSystemEntryFunction {
   class FilePicker;
 
   virtual ~FileSystemChooseEntryFunction() {}
-  virtual bool RunImpl() OVERRIDE;
+  virtual bool RunAsync() OVERRIDE;
   void ShowPicker(const ui::SelectFileDialog::FileTypeInfo& file_type_info,
                   ui::SelectFileDialog::Type picker_type);
 
@@ -176,7 +176,7 @@ class FileSystemRetainEntryFunction : public ChromeAsyncExtensionFunction {
 
  protected:
   virtual ~FileSystemRetainEntryFunction() {}
-  virtual bool RunImpl() OVERRIDE;
+  virtual bool RunAsync() OVERRIDE;
 
  private:
   // Retains the file entry referenced by |entry_id| in apps::SavedFilesService.
@@ -207,7 +207,7 @@ class FileSystemRestoreEntryFunction : public FileSystemEntryFunction {
 
  protected:
   virtual ~FileSystemRestoreEntryFunction() {}
-  virtual bool RunImpl() OVERRIDE;
+  virtual bool RunAsync() OVERRIDE;
 };
 
 }  // namespace extensions