make utf-8 default encoding for remoting_localize.py

remoting/tools/build/remoting_localize.py

Index: remoting/tools/build/remoting_localize.py
diff --git a/remoting/tools/build/remoting_localize.py b/remoting/tools/build/remoting_localize.py
index 6a88884f29292f5e829aec9dd8b083d679237c88..5c4eeb12f6c50c66468865adcdb878d14241c89e 100755
--- a/remoting/tools/build/remoting_localize.py
+++ b/remoting/tools/build/remoting_localize.py
@@ -590,7 +590,7 @@ def ReadMessagesFromFile(file_name):
   return values
 
 
-def WriteIfChanged(file_name, contents, encoding='utf-16'):
+def WriteIfChanged(file_name, contents, encoding):
   """
   Writes the specified contents to the specified file_name
   iff the contents are different than the current contents.
@@ -743,8 +743,8 @@ def DoMain(argv):
       '-d', '--define', dest='define', action='append', type='string',
       help='define a variable (NAME=VALUE).')
   parser.add_option(
-      '--encoding', dest='encoding', type='string', default='utf-16',
-      help="set the encoding of <output>. 'utf-16' is the default.")
+      '--encoding', dest='encoding', type='string', default='utf-8',
+      help="set the encoding of <output>. 'utf-8' is the default.")
   parser.add_option(
       '--jinja2', dest='jinja2', type='string',
       help="specifies path to the jinja2 library.")