Disallow slashes in filename in downloads.download()

chrome/browser/download/download_extension_api.cc

Index: chrome/browser/download/download_extension_api.cc
diff --git a/chrome/browser/download/download_extension_api.cc b/chrome/browser/download/download_extension_api.cc
index 48006b83ce1ae96bdbcd98f17722a4bffec249a1..cdf0193ff2ef33882e4c8323ea762f597ede8def 100644
--- a/chrome/browser/download/download_extension_api.cc
+++ b/chrome/browser/download/download_extension_api.cc
@@ -172,12 +172,11 @@ DownloadItem::DownloadState StateEnumFromString(const std::string& state) {
 
 bool ValidateFilename(const string16& filename) {
   // TODO(benjhayden): More robust validation of filename.
-  if (filename.size() >= 2u && filename[0] == L'.' && filename[1] == L'.')
+  if ((filename.find('/') != string16::npos) ||
+      (filename.find('\\') != string16::npos))
     return false;
-
-  if (filename.size() >= 1u && filename[0] == L'/')
+  if (filename.size() >= 2u && filename[0] == L'.' && filename[1] == L'.')
     return false;
-
   return true;
 }