supersize: Fix name normalization of top-level lambdas

tools/binary_size/libsupersize/function_signature_test.py

 #!/usr/bin/env python
 # 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.
 
 import logging
 import unittest
 
 import function_signature
 
@@ skipping 48 matching lines @@
           'const::{lambda(v8::Object**)#1}>',
           '(v8::RelocInfo, v8::Foo<(v8::PointerDirection)1>::Bar(v8::Heap*)::'
           '{lambda(v8::SlotType)#2}::operator()(v8::SlotType) const::'
           '{lambda(v8::Object**)#1})')
     check('',
           'WTF::StringAppend<WTF::String, WTF::String>::operator WTF::String',
           '()',
           ' const')
     # Make sure []s are not removed from the name part.
     check('', 'Foo', '()', ' [virtual thunk]')
+    # Template function that accepts an anonymous lambda.
+    check('',
+          'blink::FrameView::ForAllNonThrottledFrameViews<blink::FrameView::Pre'
+          'Paint()::{lambda(FrameView&)#2}>',
+          '(blink::FrameView::PrePaint()::{lambda(FrameView&)#2} const&)', '')
 
     # SkArithmeticImageFilter.cpp has class within function body. e.g.:
     #   ArithmeticFP::onCreateGLSLInstance() looks like:
     # class ArithmeticFP {
     #   GrGLSLFragmentProcessor* onCreateGLSLInstance() const {
     #     class GLSLFP {
     #       void emitCode(EmitArgs& args) { ... }
     #     };
     #     ...
     #   }
     # };
     SIG = '(anonymous namespace)::Foo::Baz() const::GLSLFP::onData(Foo, Bar)'
     got_full, got_name = function_signature.Parse(SIG)
     self.assertEqual('(anonymous namespace)::Foo::Baz', got_name)
     self.assertEqual(SIG, got_full)
 
+    # Top-level lambda.
+    # Note: Inline lambdas do not seem to be broken into their own symbols.
+    SIG = 'cc::{lambda(cc::PaintOp*)#63}::_FUN(cc::PaintOp*)'
+    got_full, got_name = function_signature.Parse(SIG)
+    self.assertEqual('cc::{lambda#63}', got_name)
+    self.assertEqual('cc::{lambda#63}(cc::PaintOp*)', got_full)
+
 
 if __name__ == '__main__':
   logging.basicConfig(level=logging.DEBUG,
                       format='%(levelname).1s %(relativeCreated)6d %(message)s')
   unittest.main()