supersize: Fix name normalization of top-level lambdas

tools/binary_size/libsupersize/models.py

 # Copyright 2017 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.
 """Classes that comprise the data model for binary size analysis.
 
 The primary classes are Symbol, and SymbolGroup.
 
 Description of common properties:
   * address: The start address of the symbol.
         May be 0 (e.g. for .bss or for SymbolGroups).
@@ skipping 311 matching lines @@
 
   def IterUniqueSymbols(self):
     seen_aliases_lists = set()
     for s in self:
       if not s.aliases:
         yield s
       elif id(s.aliases) not in seen_aliases_lists:
         seen_aliases_lists.add(id(s.aliases))
         yield s
 
+  def CountUniqueSymbols(self):
+    return sum(1 for s in self.IterUniqueSymbols())
+
   @property
   def size(self):
     if self._size is None:
       if self.IsBss():
         self._size = sum(s.size for s in self)
       else:
         self._size = sum(s.size for s in self.IterUniqueSymbols())
     return self._size
 
   @property
@@ skipping 352 matching lines @@
 
 def _ExtractPrefixBeforeSeparator(string, separator, count=1):
   idx = -len(separator)
   prev_idx = None
   for _ in xrange(count):
     idx = string.find(separator, idx + len(separator))
     if idx < 0:
       break
     prev_idx = idx
   return string[:prev_idx]