Move fileapi into its own component

webkit/fileapi/file_writer.h

Index: webkit/fileapi/file_writer.h
diff --git a/webkit/fileapi/file_writer.h b/webkit/fileapi/file_writer.h
index 109b8c7dedf017c21c8273cf907d04939536fcd6..39299d00eb8189fa2f48c16f4d5fa3dfcbee104d 100644
--- a/webkit/fileapi/file_writer.h
+++ b/webkit/fileapi/file_writer.h
@@ -8,6 +8,7 @@
 
 #include "base/basictypes.h"
 #include "net/base/completion_callback.h"
+#include "webkit/fileapi/fileapi_export.h"
 
 namespace net {
 class IOBuffer;
@@ -22,7 +23,7 @@ namespace fileapi {
 // is implemented by WebCore::FileWriter), though this class is used to
 // implement a part of it.  FileWriterDelegate is NOT a delegate of this
 // class either.
-class FileWriter {
+class FILEAPI_EXPORT_PRIVATE FileWriter {
  public:
   // Closes the file. If there's an in-flight operation, it is canceled (i.e.,
   // the callback function associated with the operation is not called).