Oilpan: add transition types to FileSystem APIs.

Source/modules/filesystem/FileWriter.h

Index: Source/modules/filesystem/FileWriter.h
diff --git a/Source/modules/filesystem/FileWriter.h b/Source/modules/filesystem/FileWriter.h
index cea0b69299135052d608e35b0ff38b44c74ee511..576013860c7f2650c449681eb1ccee84d752167c 100644
--- a/Source/modules/filesystem/FileWriter.h
+++ b/Source/modules/filesystem/FileWriter.h
@@ -48,10 +48,10 @@ class Blob;
 class ExceptionState;
 class ExecutionContext;
 
-class FileWriter FINAL : public ScriptWrappable, public FileWriterBase, public ActiveDOMObject, public EventTargetWithInlineData, public blink::WebFileWriterClient {
-    DEFINE_EVENT_TARGET_REFCOUNTING(FileWriterBase);
+class FileWriter FINAL : public FileWriterBase, public ScriptWrappable, public ActiveDOMObject, public EventTargetWithInlineData, public blink::WebFileWriterClient {
+    DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<FileWriterBase>);
 public:
-    static PassRefPtr<FileWriter> create(ExecutionContext*);
+    static PassRefPtrWillBeRawPtr<FileWriter> create(ExecutionContext*);
 
     enum ReadyState {
         INIT = 0,
@@ -85,6 +85,8 @@ public:
     DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
     DEFINE_ATTRIBUTE_EVENT_LISTENER(writeend);
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 private:
     enum Operation {
         OperationNone,
@@ -107,7 +109,7 @@ private:
 
     void setError(FileError::ErrorCode, ExceptionState&);
 
-    RefPtrWillBePersistent<FileError> m_error;
+    RefPtrWillBeMember<FileError> m_error;
     ReadyState m_readyState;
     Operation m_operationInProgress;
     Operation m_queuedOperation;
@@ -117,7 +119,7 @@ private:
     long long m_numAborts;
     long long m_recursionDepth;
     double m_lastProgressNotificationTimeMS;
-    RefPtrWillBePersistent<Blob> m_blobBeingWritten;
+    RefPtrWillBeMember<Blob> m_blobBeingWritten;
 };
 
 } // namespace WebCore