Move JSSyntaxRegExp to core as a private member. This removes the last refrences to dart:coreimpl.

runtime/vm/vm.gypi

Index: runtime/vm/vm.gypi
diff --git a/runtime/vm/vm.gypi b/runtime/vm/vm.gypi
index cc45491c817ee7c1501ccbd4b0d8c9e92a0b4e57..0fb1bd9ad32cdf40db16bcd33b382b99bf6c2854 100644
--- a/runtime/vm/vm.gypi
+++ b/runtime/vm/vm.gypi
@@ -7,8 +7,6 @@
     'builtin_in_cc_file': '../bin/builtin_in.cc',
     'corelib_cc_file': '<(SHARED_INTERMEDIATE_DIR)/corelib_gen.cc',
     'corelib_patch_cc_file': '<(SHARED_INTERMEDIATE_DIR)/corelib_patch_gen.cc',
-    'corelib_impl_cc_file': '<(SHARED_INTERMEDIATE_DIR)/corelib_impl_gen.cc',
-    'corelib_impl_patch_cc_file': '<(SHARED_INTERMEDIATE_DIR)/corelib_impl_patch_gen.cc',
     'collection_cc_file': '<(SHARED_INTERMEDIATE_DIR)/collection_gen.cc',
     'math_cc_file': '<(SHARED_INTERMEDIATE_DIR)/math_gen.cc',
     'math_patch_cc_file': '<(SHARED_INTERMEDIATE_DIR)/math_patch_gen.cc',
@@ -67,8 +65,6 @@
       'dependencies': [
         'generate_corelib_cc_file',
         'generate_corelib_patch_cc_file',
-        'generate_corelib_impl_cc_file',
-        'generate_corelib_impl_patch_cc_file',
         'generate_collection_cc_file',
         'generate_math_cc_file',
         'generate_math_patch_cc_file',
@@ -81,7 +77,6 @@
       ],
       'includes': [
         '../lib/lib_sources.gypi',
-        '../lib/lib_impl_sources.gypi',
         '../lib/isolate_sources.gypi',
         '../lib/mirrors_sources.gypi',
         '../lib/scalarlist_sources.gypi',
@@ -91,8 +86,6 @@
         # Include generated source files.
         '<(corelib_cc_file)',
         '<(corelib_patch_cc_file)',
-        '<(corelib_impl_cc_file)',
-        '<(corelib_impl_patch_cc_file)',
         '<(collection_cc_file)',
         '<(math_cc_file)',
         '<(math_patch_cc_file)',
@@ -112,7 +105,6 @@
       'type': 'static_library',
       'includes': [
         '../lib/lib_sources.gypi',
-        '../lib/lib_impl_sources.gypi',
         '../lib/isolate_sources.gypi',
         '../lib/mirrors_sources.gypi',
         '../lib/scalarlist_sources.gypi',
@@ -201,82 +193,6 @@
       ]
     },
     {
-      'target_name': 'generate_corelib_impl_cc_file',
-      'type': 'none',
-      'includes': [
-        # Load the shared core library sources.
-        '../../sdk/lib/coreimpl/corelib_impl_sources.gypi',
-      ],
-      'sources/': [
-        # Exclude all .[cc|h] files.
-        # This is only here for reference. Excludes happen after
-        # variable expansion, so the script has to do its own
-        # exclude processing of the sources being passed.
-        ['exclude', '\\.cc|h$'],
-      ],
-      'actions': [
-        {
-          'action_name': 'generate_corelib_impl_cc',
-          'inputs': [
-            '../tools/create_string_literal.py',
-            '<(builtin_in_cc_file)',
-            '<@(_sources)',
-          ],
-          'outputs': [
-            '<(corelib_impl_cc_file)',
-          ],
-          'action': [
-            'python',
-            'tools/create_string_literal.py',
-            '--output', '<(corelib_impl_cc_file)',
-            '--input_cc', '<(builtin_in_cc_file)',
-            '--include', 'vm/bootstrap.h',
-            '--var_name', 'dart::Bootstrap::corelib_impl_source_',
-            '<@(_sources)',
-          ],
-          'message': 'Generating ''<(corelib_impl_cc_file)'' file.'
-        },
-      ]
-    },
-    {
-      'target_name': 'generate_corelib_impl_patch_cc_file',
-      'type': 'none',
-      'includes': [
-        # Load the runtime implementation sources.
-        '../lib/lib_impl_sources.gypi',
-      ],
-      'sources/': [
-        # Exclude all .[cc|h] files.
-        # This is only here for reference. Excludes happen after
-        # variable expansion, so the script has to do its own
-        # exclude processing of the sources being passed.
-        ['exclude', '\\.cc|h$'],
-      ],
-      'actions': [
-        {
-          'action_name': 'generate_corelib_impl_patch_cc',
-          'inputs': [
-            '../tools/create_string_literal.py',
-            '<(builtin_in_cc_file)',
-            '<@(_sources)',
-          ],
-          'outputs': [
-            '<(corelib_impl_patch_cc_file)',
-          ],
-          'action': [
-            'python',
-            'tools/create_string_literal.py',
-            '--output', '<(corelib_impl_patch_cc_file)',
-            '--input_cc', '<(builtin_in_cc_file)',
-            '--include', 'vm/bootstrap.h',
-            '--var_name', 'dart::Bootstrap::corelib_impl_patch_',
-            '<@(_sources)',
-          ],
-          'message': 'Generating ''<(corelib_impl_patch_cc_file)'' file.'
-        },
-      ]
-    },
-    {
       'target_name': 'generate_collection_cc_file',
       'type': 'none',
       'includes': [