Change function source fingerprint calculation to rely on tokens exclusively and

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 6733 matching lines @@
   const String& result = String::Handle(func_script.GetSnippet(
       from_line, from_col, to_line, to_col + last_tok_len));
   ASSERT(!result.IsNull());
   return result.raw();
 }
 
 
 // Construct fingerprint from token stream. The token stream contains also
 // arguments.
 int32_t Function::SourceFingerprint() const {
-  uint32_t result = IsImplicitClosureFunction()
-      ? String::Handle(Function::Handle(parent_function()).Signature()).Hash()
-      : String::Handle(Signature()).Hash();
+  uint32_t result = 0;
   TokenStream::Iterator tokens_iterator(TokenStream::Handle(
       Script::Handle(script()).tokens()), token_pos());
   Object& obj = Object::Handle();
   String& literal = String::Handle();
   while (tokens_iterator.CurrentPosition() < end_token_pos()) {
     uint32_t val = 0;
     obj = tokens_iterator.CurrentToken();
     if (obj.IsSmi()) {
       val = Smi::Cast(obj).Value();
     } else {
@@ skipping 14913 matching lines @@
   return UserTag::null();
 }
 
 
 const char* UserTag::ToCString() const {
   const String& tag_label = String::Handle(label());
   return tag_label.ToCString();
 }
 
 }  // namespace dart