Handle non-UTF-8 encoded files in presubmit checks.

gclient_utils.py

Index: gclient_utils.py
diff --git a/gclient_utils.py b/gclient_utils.py
index b413a88eb8a5d9150126e057c3ed7fd67787fe02..c24be5229cc6a78c5ba8b7f80f2ae9b6e953b473 100644
--- a/gclient_utils.py
+++ b/gclient_utils.py
@@ -80,7 +80,11 @@ def FileRead(filename, mode='rU'):
   with open(filename, mode=mode) as f:
     # codecs.open() has different behavior than open() on python 2.6 so use
     # open() and decode manually.
-    return f.read().decode('utf-8')
+    s = f.read()
+    try:
+      return s.decode('utf-8')
+    except UnicodeDecodeError:
+      return s
 
 
 def FileWrite(filename, content, mode='w'):