Changed dangerous downloading to use .jar files.

chrome/test/functional/downloads.py

Index: chrome/test/functional/downloads.py
diff --git a/chrome/test/functional/downloads.py b/chrome/test/functional/downloads.py
index 6ae0bcf85dfe44fc3c1be408c93d0be119012f37..47bb3d67db1c4f50666018aacf33903280309d22 100644
--- a/chrome/test/functional/downloads.py
+++ b/chrome/test/functional/downloads.py
@@ -64,9 +64,7 @@ class DownloadsTest(pyauto.PyUITest):
   def _GetDangerousDownload(self):
     """Returns the file path for a dangerous download for this OS."""
     sub_path = os.path.join(self.DataDir(), 'downloads', 'dangerous')
-    if self.IsMac():
-      return os.path.join(sub_path, 'invalid-dummy.dmg')
-    return os.path.join(sub_path, 'dangerous.exe')
+    return os.path.join(sub_path, 'dangerous.jar')
 
   def _EqualFileContents(self, file1, file2):
     """Determine if 2 given files have the same contents."""