Change some snapshot- or temporary-file related changes to use ScopedFile

webkit/fileapi/local_file_util.h

Index: webkit/fileapi/local_file_util.h
diff --git a/webkit/fileapi/local_file_util.h b/webkit/fileapi/local_file_util.h
index f7bc9f9013ea8c877312a77ef2b9902096ef00c3..0321f2c642adb06456e1dfd865fc8730779025a3 100644
--- a/webkit/fileapi/local_file_util.h
+++ b/webkit/fileapi/local_file_util.h
@@ -82,12 +82,12 @@ class WEBKIT_STORAGE_EXPORT_PRIVATE LocalFileUtil : public FileSystemFileUtil {
   virtual base::PlatformFileError DeleteDirectory(
       FileSystemOperationContext* context,
       const FileSystemURL& url) OVERRIDE;
-  virtual base::PlatformFileError CreateSnapshotFile(
+  virtual webkit_blob::ScopedFile CreateSnapshotFile(
       FileSystemOperationContext* context,
       const FileSystemURL& url,
+      base::PlatformFileError* error,
       base::PlatformFileInfo* file_info,
-      base::FilePath* platform_path,
-      SnapshotFilePolicy* snapshot_policy) OVERRIDE;
+      base::FilePath* platform_path) OVERRIDE;
 
  private:
   // Given the filesystem url, produces a real, full local path for the