Move compilation error handling into a separate class.

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.
 
 # Because standalone V8 builds are not supported, assume this is part of a
 # Chromium build.
 import("//build/module_args/v8.gni")
 
 # TODO(jochen): These will need to be user-settable to support standalone V8
 # builds.
@@ skipping 841 matching lines @@
     "src/objects-inl.h",
     "src/objects-printer.cc",
     "src/objects.cc",
     "src/objects.h",
     "src/optimizing-compiler-thread.cc",
     "src/optimizing-compiler-thread.h",
     "src/ostreams.cc",
     "src/ostreams.h",
     "src/parser.cc",
     "src/parser.h",
+    "src/pending-compilation-error-handler.cc",
+    "src/pending-compilation-error-handler.h",
     "src/perf-jit.cc",
     "src/perf-jit.h",
     "src/preparse-data-format.h",
     "src/preparse-data.cc",
     "src/preparse-data.h",
     "src/preparser.cc",
     "src/preparser.h",
     "src/prettyprinter.cc",
     "src/prettyprinter.h",
     "src/profile-generator-inl.h",
@@ skipping 683 matching lines @@
       sources += [
         "src/d8-debug.cc",
         "$target_gen_dir/d8-js.cc",
       ]
     }
     if (v8_enable_i18n_support) {
       deps += [ "//third_party/icu" ]
     }
   }
 }