FileAPI: Factor out getting root URI and FS name parts into each FS backend

webkit/browser/fileapi/file_system_context.cc

Index: webkit/browser/fileapi/file_system_context.cc
diff --git a/webkit/browser/fileapi/file_system_context.cc b/webkit/browser/fileapi/file_system_context.cc
index 49f6388f96a9276e043159b713d1bf1c504766ae..82d3affbb601d9c96ae6329f9a9a3d40a30c1c89 100644
--- a/webkit/browser/fileapi/file_system_context.cc
+++ b/webkit/browser/fileapi/file_system_context.cc
@@ -27,7 +27,6 @@
 #include "webkit/browser/fileapi/sandbox_file_system_backend.h"
 #include "webkit/browser/fileapi/syncable/local_file_change_tracker.h"
 #include "webkit/browser/fileapi/syncable/local_file_sync_context.h"
-#include "webkit/browser/fileapi/syncable/syncable_file_system_util.h"
 #include "webkit/browser/fileapi/test_file_system_backend.h"
 #include "webkit/browser/quota/quota_manager.h"
 #include "webkit/browser/quota/special_storage_policy.h"
@@ -269,16 +268,8 @@ void FileSystemContext::OpenFileSystem(
     return;
   }
 
-  GURL root_url;
-  if (type == kFileSystemTypeSyncable)
-    root_url = sync_file_system::GetSyncableFileSystemRootURI(origin_url);
-  else
-    root_url = GetFileSystemRootURI(origin_url, type);
-  std::string name = GetFileSystemName(origin_url, type);
-
-  backend->OpenFileSystem(
-      origin_url, type, mode,
-      base::Bind(&DidOpenFileSystem, callback, root_url, name));
+  backend->OpenFileSystem(origin_url, type, mode,
+                          base::Bind(&DidOpenFileSystem, callback));
 }
 
 void FileSystemContext::DeleteFileSystem(