Revert 171408

ppapi/cpp/private/flash_file.h

Index: ppapi/cpp/private/flash_file.h
diff --git a/ppapi/cpp/private/flash_file.h b/ppapi/cpp/private/flash_file.h
index 04ab195eeb32168f4e55edd4cb3067b07eb2b14e..a7c655a29c39ddbf169b4fd021542f838ee80324 100644
--- a/ppapi/cpp/private/flash_file.h
+++ b/ppapi/cpp/private/flash_file.h
@@ -24,6 +24,9 @@ class FileModuleLocal {
   // 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 @@ class FileModuleLocal {
                              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);
 };