Dart: Fix conversion of identifiers to lowerCamelCase.

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

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Generates dart source files from a mojom.Module."""
 
 import os
 import re
 import shutil
 import sys
@@ skipping 208 matching lines @@
     value_type = DartDeclType(kind.value_kind)
     return "Map<"+ key_type + ", " + value_type + ">"
   if mojom.IsInterfaceKind(kind) or \
      mojom.IsInterfaceRequestKind(kind):
     return "Object"
   if mojom.IsEnumKind(kind):
     return GetDartType(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('_')]
 
 def UpperCamelCase(name):
   return ''.join([x.capitalize() for x in NameToComponent(name)])
 
 def CamelCase(name):
   uccc = UpperCamelCase(name)
   return uccc[0].lower() + uccc[1:]
 
@@ skipping 311 matching lines @@
         interface_to_import[name] = each_import["unique_name"] + "." + name
     return interface_to_import
 
   def ImportedFrom(self):
     interface_to_import = {}
     for each_import in self.module.imports:
       for each_interface in each_import["module"].interfaces:
         name = each_interface.name
         interface_to_import[name] = each_import["unique_name"] + "."
     return interface_to_import