Fix difference on behavior on python 2.6 on linux with open(mode='rU').

TBR=cmp@chromium.org
BUG=
TEST=manually tested gclient sync works on linux with python 2.6


Review URL: https://chromiumcodereview.appspot.com/10694069

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@145315 0039d316-1c4b-4281-b951-d872f2087c98

gclient_utils.py

@@ -78,7 +78,11 @@ class PrintableObject(object):
 
 def FileRead(filename, mode='rU'):
   with codecs.open(filename, mode=mode, encoding='utf-8') as f:
-    return f.read()
+    content = f.read()
+    if mode.endswith('U'):
+      # codecs.open() has different behavior than open() on python 2.6.
+      return content.replace('\r\n', '\n')
+    return content
 
 
 def FileWrite(filename, content, mode='w'):