Add initial code to do filename munging in the FileSystem....

webkit/fileapi/sandboxed_file_system_context.h

Index: webkit/fileapi/sandboxed_file_system_context.h
===================================================================
--- webkit/fileapi/sandboxed_file_system_context.h	(revision 72915)
+++ webkit/fileapi/sandboxed_file_system_context.h	(working copy)
@@ -12,6 +12,7 @@
 class GURL;
 
 namespace base {
+class FileUtilProxyBase;
 class MessageLoopProxy;
 }
 
@@ -19,6 +20,7 @@
 
 class FileSystemPathManager;
 class FileSystemQuotaManager;
+class ObfuscatedFileUtilProxy;
 class SandboxedFileSystemContext;
 
 struct DefaultContextDeleter;
@@ -34,7 +36,8 @@
       const FilePath& profile_path,
       bool is_incognito,
       bool allow_file_access_from_files,
-      bool unlimited_quota);
+      bool unlimited_quota,
+      bool obfuscate = false);
   ~SandboxedFileSystemContext();
 
   void Shutdown();
@@ -47,7 +50,7 @@
 
   FileSystemPathManager* path_manager() { return path_manager_.get(); }
   FileSystemQuotaManager* quota_manager() { return quota_manager_.get(); }
-
+  base::FileUtilProxyBase* file_util_proxy() { return file_util_proxy_; }
  private:
   friend struct DefaultContextDeleter;
   void DeleteOnCorrectThread() const;
@@ -57,6 +60,8 @@
   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
   scoped_ptr<FileSystemPathManager> path_manager_;
   scoped_ptr<FileSystemQuotaManager> quota_manager_;
+  base::FileUtilProxyBase* file_util_proxy_;
+  bool delete_file_util_proxy_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(SandboxedFileSystemContext);
 };