Dart: Fix conversion of identifiers to lowerCamelCase.

mojo/public/tools/bindings/generators/mojom_dart_generator.py

Index: mojo/public/tools/bindings/generators/mojom_dart_generator.py
diff --git a/mojo/public/tools/bindings/generators/mojom_dart_generator.py b/mojo/public/tools/bindings/generators/mojom_dart_generator.py
index 24ffbf335e4bb6986ae54ca7b21b852e5d342c48..c0cdcbcd022d6d9e0eda3a41eb2757df75b56eff 100644
--- a/mojo/public/tools/bindings/generators/mojom_dart_generator.py
+++ b/mojo/public/tools/bindings/generators/mojom_dart_generator.py
@@ -226,10 +226,10 @@ def DartDeclType(kind):
 
 def NameToComponent(name):
   # insert '_' between anything and a Title name (e.g, HTTPEntry2FooBar ->
-  # HTTP_Entry2_FooBar)
-  name = re.sub('([^_])([A-Z][^A-Z_]+)', r'\1_\2', name)
+  # HTTP_Entry2_FooBar). Numbers terminate a string of lower-case characters.
+  name = re.sub('([^_])([A-Z][^A-Z1-9_]+)', r'\1_\2', name)
   # insert '_' between non upper and start of upper blocks (e.g.,
-  # HTTP_Entry2_FooBar -> HTTP_Entry2_Foo_Bar)
+  # HTTP_Entry2_FooBar -> HTTP_Entry2_Foo_Bar).
   name = re.sub('([^A-Z_])([A-Z])', r'\1_\2', name)
   return [x.lower() for x in name.split('_')]