Revert 138444 - Always pass FileSystemContext to ObfuscatedFileUtil operations

webkit/fileapi/file_system_quota_util.h

Index: webkit/fileapi/file_system_quota_util.h
===================================================================
--- webkit/fileapi/file_system_quota_util.h	(revision 139069)
+++ webkit/fileapi/file_system_quota_util.h	(working copy)
@@ -23,8 +23,6 @@
 
 namespace fileapi {
 
-class FileSystemContext;
-
 // An abstract interface that provides common quota-related utility functions
 // for internal filesystem modules.  The main consumer of this class is
 // file_system_quota_client and quota_file_util.
@@ -69,10 +67,8 @@
 
   // Called by quota client.
   // Returns the amount of data used for the origin for usage tracking.
-  virtual int64 GetOriginUsageOnFileThread(
-      fileapi::FileSystemContext* file_system_context,
-      const GURL& origin_url,
-      fileapi::FileSystemType type) = 0;
+  virtual int64 GetOriginUsageOnFileThread(const GURL& origin_url,
+                                           fileapi::FileSystemType type) = 0;
 
   // Called by quota file util.
   virtual void UpdateOriginUsageOnFileThread(quota::QuotaManagerProxy* proxy,