Extract runtime functions for classes into a separate file.

BUILD.gn

 # Copyright 2014 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.
 
 # TODO(jochen): These will need to be user-settable to support standalone V8
 # builds.
 v8_compress_startup_data = "off"
 v8_deprecation_warnings = false
 v8_enable_disassembler = false
 v8_enable_gdbjit = false
@@ skipping 806 matching lines @@
     "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",
     "src/rewriter.h",
     "src/runtime-profiler.cc",
     "src/runtime-profiler.h",
+    "src/runtime/runtime-classes.cc",
     "src/runtime/runtime-collections.cc",
     "src/runtime/runtime-compiler.cc",
     "src/runtime/runtime-i18n.cc",
     "src/runtime/runtime-date.cc",
     "src/runtime/runtime-debug.cc",
     "src/runtime/runtime-function.cc",
     "src/runtime/runtime-generator.cc",
     "src/runtime/runtime-json.cc",
     "src/runtime/runtime-literals.cc",
     "src/runtime/runtime-liveedit.cc",
@@ skipping 584 matching lines @@
     deps = [
       ":v8_base",
       ":v8_nosnapshot",
     ]
   }
 
   direct_dependent_configs = [ ":external_config" ]
 }
 
 }