Revert 171080

ppapi/cpp/private/flash_file.h

Index: ppapi/cpp/private/flash_file.h
===================================================================
--- ppapi/cpp/private/flash_file.h	(revision 171259)
+++ ppapi/cpp/private/flash_file.h	(working copy)
@@ -24,6 +24,9 @@
   // Returns true if the required interface is available.
   static bool IsAvailable();
 
+  static bool CreateThreadAdapterForInstance(const InstanceHandle& instance);
+  static void ClearThreadAdapterForInstance(const InstanceHandle& instance);
+
   // Returns |PP_kInvalidFileHandle| on error.
   static PP_FileHandle OpenFile(const InstanceHandle& instance,
                                 const std::string& path,
@@ -48,6 +51,9 @@
                              const std::string& path,
                              std::vector<DirEntry>* dir_contents);
 
+  // Returns true if |CreateTemporaryFile()| is supported.
+  // TODO(viettrungluu): Remove this sometime after M21 ships to Stable?
+  static bool IsCreateTemporaryFileAvailable();
   // Returns |PP_kInvalidFileHandle| on error.
   static PP_FileHandle CreateTemporaryFile(const InstanceHandle& instance);
 };