Mojo JS bindings: switch all mojo/ layout tests to use the new mode.

mojo/public/tools/bindings/pylib/mojom/generate/generator.py

Index: mojo/public/tools/bindings/pylib/mojom/generate/generator.py
diff --git a/mojo/public/tools/bindings/pylib/mojom/generate/generator.py b/mojo/public/tools/bindings/pylib/mojom/generate/generator.py
index c7bbbe3c119b4d82fe32e143423453ec81502260..2778dcb25825f850c03fe94976725eee8e85e0ff 100644
--- a/mojo/public/tools/bindings/pylib/mojom/generate/generator.py
+++ b/mojo/public/tools/bindings/pylib/mojom/generate/generator.py
@@ -25,9 +25,9 @@ def ToCamel(identifier, lower_initial=False, dilimiter='_'):
   if |lower_initial| is set to True), and joins the words. Please note that for
   each word, all the characters except the first one are untouched.
   """
-  result = ''.join(
-      word[0].upper() + word[1:] for word in identifier.split(dilimiter))
-  if lower_initial:
+  result = ''.join(word[0].upper() + word[1:]
+      for word in identifier.split(dilimiter) if word)
+  if lower_initial and result:
     result = result[0].lower() + result[1:]
   return result