Cleanup: Some simplifications in json_schema_compiler.

tools/json_schema_compiler/util_cc_helper.py

 # Copyright (c) 2012 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.
 
 _API_UTIL_NAMESPACE = 'json_schema_compiler::util'
 
 
 class UtilCCHelper(object):
   """A util class that generates code that uses
   tools/json_schema_compiler/util.cc.
   """
   def __init__(self, type_manager):
     self._type_manager = type_manager
 
   def PopulateArrayFromList(self, src, dst, optional):
     """Generates code to get an array from src into dst.
 
     src: ListValue*
     dst: std::vector or scoped_ptr<std::vector>
     """
-    if optional:
-      val = '%(namespace)s::PopulateOptionalArrayFromList(*%(src)s, &%(dst)s)'
-    else:
-      val = '%(namespace)s::PopulateArrayFromList(*%(src)s, &%(dst)s)'
-    return val % {
-      'namespace': _API_UTIL_NAMESPACE,
-      'src': src,
-      'dst': dst
-    }
+    populate_list_fn = ('PopulateOptionalArrayFromList' if optional
+                            else 'PopulateArrayFromList')
+    return ('%s::%s(*%s, &%s)') % (_API_UTIL_NAMESPACE,
+                                   populate_list_fn,
+                                   src,
+                                   dst)
 
   def CreateValueFromArray(self, src, optional):
     """Generates code to create a scoped_pt<Value> from the array at src.
 
     |src| The variable to convert, either a vector or scoped_ptr<vector>.
     |optional| Whether |type_| was optional. Optional types are pointers so
         must be treated differently.
     """
     if optional:
       name = 'CreateValueFromOptionalArray'
     else:
       name = 'CreateValueFromArray'
     return '%s::%s(%s)' % (_API_UTIL_NAMESPACE, name, src)
 
   def GetIncludePath(self):
     return '#include "tools/json_schema_compiler/util.h"'
 
   def GetValueTypeString(self, value, is_ptr=False):
     call = '.GetType()'
     if is_ptr:
       call = '->GetType()'
     return 'json_schema_compiler::util::ValueTypeToString(%s%s)' % (value, call)