Decouple FileSystem and WebSQL callbacks from VoidCallback and it non-refcounted

Source/modules/filesystem/Entry.h

Index: Source/modules/filesystem/Entry.h
diff --git a/Source/modules/filesystem/Entry.h b/Source/modules/filesystem/Entry.h
index 6a806f713384791a7871411863abca25bea6db8f..048d409206e68979edd3227ab646fbd002b3c88a 100644
--- a/Source/modules/filesystem/Entry.h
+++ b/Source/modules/filesystem/Entry.h
@@ -44,17 +44,17 @@ class EntryCallback;
 class EntrySync;
 class ErrorCallback;
 class MetadataCallback;
-class VoidCallback;
+class FileSystemVoidCallback;
 
 class Entry : public EntryBase, public ScriptWrappable {
 public:
     DOMFileSystem* filesystem() const { return static_cast<DOMFileSystem*>(m_fileSystem.get()); }
 
-    void getMetadata(PassRefPtr<MetadataCallback> successCallback = 0, PassRefPtr<ErrorCallback> errorCallback = 0);
-    void moveTo(PassRefPtr<DirectoryEntry> parent, const String& name = String(), PassRefPtr<EntryCallback> successCallback = 0, PassRefPtr<ErrorCallback> errorCallback = 0) const;
-    void copyTo(PassRefPtr<DirectoryEntry> parent, const String& name = String(), PassRefPtr<EntryCallback> successCallback = 0, PassRefPtr<ErrorCallback> errorCallback = 0) const;
-    void remove(PassRefPtr<VoidCallback> successCallback = 0, PassRefPtr<ErrorCallback> errorCallback = 0) const;
-    void getParent(PassRefPtr<EntryCallback> successCallback = 0, PassRefPtr<ErrorCallback> errorCallback = 0) const;
+    void getMetadata(PassRefPtr<MetadataCallback> successCallback = 0, PassRefPtr<ErrorCallback> = 0);
+    void moveTo(PassRefPtr<DirectoryEntry> parent, const String& name = String(), PassRefPtr<EntryCallback> successCallback = 0, PassRefPtr<ErrorCallback> = 0) const;
+    void copyTo(PassRefPtr<DirectoryEntry> parent, const String& name = String(), PassRefPtr<EntryCallback> successCallback = 0, PassRefPtr<ErrorCallback> = 0) const;
+    void remove(PassRefPtr<FileSystemVoidCallback> successCallback = 0, PassRefPtr<ErrorCallback> = 0) const;
+    void getParent(PassRefPtr<EntryCallback> successCallback = 0, PassRefPtr<ErrorCallback> = 0) const;
 
 protected:
     Entry(PassRefPtr<DOMFileSystemBase>, const String& fullPath);