Computes the total size of the files in a directory...

base/file_util.cc

Index: base/file_util.cc
===================================================================
--- base/file_util.cc	(revision 42362)
+++ base/file_util.cc	(working copy)
@@ -268,6 +268,23 @@
   return true;
 }
 
+int64 ComputeDirectorySize(const FilePath& root_path) {
+  int64 running_size = 0;
+  FileEnumerator file_iter(root_path, true, FileEnumerator::FILES);
+  for (FilePath current = file_iter.Next(); !current.empty();
+       current = file_iter.Next()) {
+    FileEnumerator::FindInfo info;
+    file_iter.GetFindInfo(&info);
+#if defined(OS_WIN)
+    LARGE_INTEGER li = { info.nFileSizeLow, info.nFileSizeHigh };
+    running_size += li.QuadPart;
+#else
+    running_size += info.stat.st_size;
+#endif
+  }
+  return running_size;
+}
+
 ///////////////////////////////////////////////
 // MemoryMappedFile