Adding Size() to AbstractFileEnumerator

webkit/fileapi/sandbox_mount_point_provider.cc

Index: webkit/fileapi/sandbox_mount_point_provider.cc
diff --git a/webkit/fileapi/sandbox_mount_point_provider.cc b/webkit/fileapi/sandbox_mount_point_provider.cc
index dbef6c315307620fc222b286809a3706d250f4ad..b8f488b1a9776710270bc42fb14f8e6b0b48f88b 100644
--- a/webkit/fileapi/sandbox_mount_point_provider.cc
+++ b/webkit/fileapi/sandbox_mount_point_provider.cc
@@ -554,14 +554,7 @@ int64 SandboxMountPointProvider::GetOriginUsageOnFileThread(
   while (!(file_path_each = enumerator->Next()).empty()) {
     base::PlatformFileInfo file_info;
     FilePath platform_file_path;
-    if (!enumerator->IsDirectory()) {
-      base::PlatformFileError error = sandbox_file_util_->GetFileInfo(
-          &context, file_path_each, &file_info, &platform_file_path);
-      if (error != base::PLATFORM_FILE_OK)
-        NOTREACHED();
-      else
-        usage += file_info.size;
-    }
+    usage += enumerator->Size();
     usage += ObfuscatedFileSystemFileUtil::ComputeFilePathCost(file_path_each);
   }
   // This clears the dirty flag too.