Introduce a PrototypeIterator class and use it for prototype access

tools/gyp/v8.gyp

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 567 matching lines @@
         '../../src/preparser.cc',
         '../../src/preparser.h',
         '../../src/prettyprinter.cc',
         '../../src/prettyprinter.h',
         '../../src/profile-generator-inl.h',
         '../../src/profile-generator.cc',
         '../../src/profile-generator.h',
         '../../src/property-details.h',
         '../../src/property.cc',
         '../../src/property.h',
+        '../../src/prototype.h',
         '../../src/regexp-macro-assembler-irregexp-inl.h',
         '../../src/regexp-macro-assembler-irregexp.cc',
         '../../src/regexp-macro-assembler-irregexp.h',
         '../../src/regexp-macro-assembler-tracer.cc',
         '../../src/regexp-macro-assembler-tracer.h',
         '../../src/regexp-macro-assembler.cc',
         '../../src/regexp-macro-assembler.h',
         '../../src/regexp-stack.cc',
         '../../src/regexp-stack.h',
         '../../src/rewriter.cc',
@@ skipping 845 matching lines @@
         }],
         ['v8_compress_startup_data=="bz2"', {
           'libraries': [
             '-lbz2',
           ]
         }],
       ],
     },
   ],
 }