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

Source/modules/filesystem/FileSystemCallbacks.cpp

Index: Source/modules/filesystem/FileSystemCallbacks.cpp
diff --git a/Source/modules/filesystem/FileSystemCallbacks.cpp b/Source/modules/filesystem/FileSystemCallbacks.cpp
index 14474155cc714dc2346057fe13c56ed1b0e2270a..c6ffed33552d4a31b3025cbd03f98486be878eda 100644
--- a/Source/modules/filesystem/FileSystemCallbacks.cpp
+++ b/Source/modules/filesystem/FileSystemCallbacks.cpp
@@ -33,7 +33,6 @@
 
 #include "core/dom/ExecutionContext.h"
 #include "core/fileapi/FileError.h"
-#include "core/html/VoidCallback.h"
 #include "modules/filesystem/DOMFilePath.h"
 #include "modules/filesystem/DOMFileSystemBase.h"
 #include "modules/filesystem/DirectoryEntry.h"
@@ -43,6 +42,7 @@
 #include "modules/filesystem/ErrorCallback.h"
 #include "modules/filesystem/FileEntry.h"
 #include "modules/filesystem/FileSystemCallback.h"
+#include "modules/filesystem/FileSystemVoidCallback.h"
 #include "modules/filesystem/FileWriterBase.h"
 #include "modules/filesystem/FileWriterBaseCallback.h"
 #include "modules/filesystem/Metadata.h"
@@ -270,12 +270,12 @@ void FileWriterBaseCallbacks::didCreateFileWriter(PassOwnPtr<blink::WebFileWrite
 
 // VoidCallbacks --------------------------------------------------------------
 
-PassOwnPtr<AsyncFileSystemCallbacks> VoidCallbacks::create(PassRefPtr<VoidCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback, DOMFileSystemBase* fileSystem)
+PassOwnPtr<AsyncFileSystemCallbacks> VoidCallbacks::create(PassRefPtr<FileSystemVoidCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback, DOMFileSystemBase* fileSystem)
 {
     return adoptPtr(new VoidCallbacks(successCallback, errorCallback, fileSystem));
 }
 
-VoidCallbacks::VoidCallbacks(PassRefPtr<VoidCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback, DOMFileSystemBase* fileSystem)
+VoidCallbacks::VoidCallbacks(PassRefPtr<FileSystemVoidCallback> successCallback, PassRefPtr<ErrorCallback> errorCallback, DOMFileSystemBase* fileSystem)
     : FileSystemCallbacksBase(errorCallback, fileSystem)
     , m_successCallback(successCallback)
 {