[v8 gc] Introduce a base class for all objects that can have pending activity

third_party/WebKit/Source/modules/filesystem/DOMFileSystem.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef DOMFileSystem_h
 #define DOMFileSystem_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
+#include "bindings/core/v8/V8GCRoot.h"
 #include "core/dom/ActiveDOMObject.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/ExecutionContextTask.h"
 #include "modules/ModulesExport.h"
 #include "modules/filesystem/DOMFileSystemBase.h"
 #include "modules/filesystem/EntriesCallback.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebTraceLocation.h"
 
 namespace blink {
 
 class DirectoryEntry;
 class BlobCallback;
 class FileEntry;
 class FileWriterCallback;
 
-class MODULES_EXPORT DOMFileSystem final : public DOMFileSystemBase, public ScriptWrappable, public ActiveDOMObject {
+class MODULES_EXPORT DOMFileSystem final : public DOMFileSystemBase, public ScriptWrappable, public ActiveDOMObject, public V8GCRoot {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMFileSystem);
 public:
     static DOMFileSystem* create(ExecutionContext*, const String& name, FileSystemType, const KURL& rootURL);
 
     // Creates a new isolated file system for the given filesystemId.
     static DOMFileSystem* createIsolatedFileSystem(ExecutionContext*, const String& filesystemId);
 
     DirectoryEntry* root() const;
 
@@ skipping 145 matching lines @@
 void DOMFileSystem::scheduleCallback(ExecutionContext* executionContext, CB* callback)
 {
     ASSERT(executionContext->isContextThread());
     if (callback)
         executionContext->postTask(BLINK_FROM_HERE, adoptPtr(new DispatchCallbackNoArgTask<CB>(callback)));
 }
 
 } // namespace blink
 
 #endif // DOMFileSystem_h