Switch MB to write the GN args to args.gn.

build/gn_helpers.py

Index: build/gn_helpers.py
diff --git a/build/gn_helpers.py b/build/gn_helpers.py
index 6aeddae5fd853c7e58def9254e5a24a289853710..2d5d9863b949e797b351789e7d0355b9b3364321 100644
--- a/build/gn_helpers.py
+++ b/build/gn_helpers.py
@@ -24,12 +24,12 @@ class GNException(Exception):
 
 
 def ToGNString(value, allow_dicts = True):
-  """Prints the given value to stdout.
+  """Returns a stringified GN equivalent of the Python value.
 
   allow_dicts indicates if this function will allow converting dictionaries
   to GN scopes. This is only possible at the top level, you can't nest a
   GN scope in a list, so this should be set to False for recursive calls."""
-  if isinstance(value, str):
+  if isinstance(value, basestring):
     if value.find('\n') >= 0:
       raise GNException("Trying to print a string with a newline in it.")
     return '"' + \
@@ -51,8 +51,8 @@ def ToGNString(value, allow_dicts = True):
     if not allow_dicts:
       raise GNException("Attempting to recursively print a dictionary.")
     result = ""
-    for key in value:
-      if not isinstance(key, str):
+    for key in sorted(value):
+      if not isinstance(key, basestring):
         raise GNException("Dictionary key is not a string.")
       result += "%s = %s\n" % (key, ToGNString(value[key], False))
     return result