Make EqualsIgnoringPrivateKey work with mixin applications.

runtime/vm/object_test.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 "platform/globals.h"
 
 #include "vm/assembler.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 3173 matching lines @@
   // Private mismatch.
   mangled_name = OneByteString::New("food@12345");
   bare_name = OneByteString::New("foo");
   EXPECT(!String::EqualsIgnoringPrivateKey(mangled_name, bare_name));
 
   // Private mismatch 2.
   mangled_name = OneByteString::New("foo@12345");
   bare_name = OneByteString::New("food");
   EXPECT(!String::EqualsIgnoringPrivateKey(mangled_name, bare_name));
 
+  // Private mixin application match.
+  mangled_name = OneByteString::New("_M1@12345&_M2@12345&_M3@12345");
+  bare_name = OneByteString::New("_M1&_M2&_M3");
+  EXPECT(String::EqualsIgnoringPrivateKey(mangled_name, bare_name));
+
+  // Private mixin application mismatch.
+  mangled_name = OneByteString::New("_M1@12345&_M2@12345&_M3@12345");
+  bare_name = OneByteString::New("_M1&_M2&_M4");
+  EXPECT(!String::EqualsIgnoringPrivateKey(mangled_name, bare_name));
+
   // Private constructor match.
   mangled_name = OneByteString::New("foo@12345.");
   bare_name = OneByteString::New("foo.");
   EXPECT(String::EqualsIgnoringPrivateKey(mangled_name, bare_name));
 
   // Private constructor mismatch.
   mangled_name = OneByteString::New("foo@12345.");
   bare_name = OneByteString::New("foo");
   EXPECT(!String::EqualsIgnoringPrivateKey(mangled_name, bare_name));
 
@@ skipping 1506 matching lines @@
   // utf32->utf16 conversion.
   int32_t char_codes[] = {0,      0x0a,   0x0d,   0x7f,   0xff,
                           0xffff, 0xd800, 0xdc00, 0xdbff, 0xdfff};
 
   const String& str =
       String::Handle(String::FromUTF32(char_codes, ARRAY_SIZE(char_codes)));
   EXPECT(str.Equals(char_codes, ARRAY_SIZE(char_codes)));
 }
 
 }  // namespace dart