When getting content for a moved file w/ history, don't convert newlines in output of 'git show'

BUG=339068

Review URL: https://codereview.chromium.org/442893003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@287615 0039d316-1c4b-4281-b951-d872f2087c98

third_party/upload.py

@@ -1659,7 +1659,8 @@ class GitVCS(VersionControlSystem):
       if filename not in self.hashes:
         # If a rename doesn't change the content, we never get a hash.
         base_content = RunShell(
-            ["git", "show", "HEAD:" + filename], silent_ok=True)
+            ["git", "show", "HEAD:" + filename], silent_ok=True,
+            universal_newlines=False)
     elif not hash_before:
       status = "A"
       base_content = ""