Revert 282890 "[fsp] Add an option for mounting in R/W mode."

trunk/src/chrome/browser/chromeos/file_system_provider/service.h

Index: trunk/src/chrome/browser/chromeos/file_system_provider/service.h
===================================================================
--- trunk/src/chrome/browser/chromeos/file_system_provider/service.h	(revision 282899)
+++ trunk/src/chrome/browser/chromeos/file_system_provider/service.h	(working copy)
@@ -39,7 +39,6 @@
 // Key names for preferences.
 extern const char kPrefKeyFileSystemId[];
 extern const char kPrefKeyDisplayName[];
-extern const char kPrefKeyWritable[];
 
 class ProvidedFileSystemFactoryInterface;
 class ProvidedFileSystemInfo;
@@ -72,14 +71,11 @@
   void SetFileSystemFactoryForTesting(
       const FileSystemFactoryCallback& factory_callback);
 
-  // Mounts a file system provided by an extension with the |extension_id|. If
-  // |writable| is set to true, then the file system is mounted in a R/W mode.
-  // Otherwise, only read-only operations are supported. For success, returns
-  // true, otherwise false.
+  // Mounts a file system provided by an extension with the |extension_id|.
+  // For success, returns true, otherwise false.
   bool MountFileSystem(const std::string& extension_id,
                        const std::string& file_system_id,
-                       const std::string& display_name,
-                       bool writable);
+                       const std::string& display_name);
 
   // Unmounts a file system with the specified |file_system_id| for the
   // |extension_id|. For success returns true, otherwise false.