Create a internal, global native context used only for generated code stubs

tools/gyp/v8.gyp

Index: tools/gyp/v8.gyp
diff --git a/tools/gyp/v8.gyp b/tools/gyp/v8.gyp
index e1caeab7c378ac67fdb5df176ac9bb6dfa252c5a..3457c19e86157734723a02f3f2041118dc7ce47c 100644
--- a/tools/gyp/v8.gyp
+++ b/tools/gyp/v8.gyp
@@ -179,6 +179,7 @@
       ],
       'sources': [
         '<(SHARED_INTERMEDIATE_DIR)/libraries.cc',
+        '<(SHARED_INTERMEDIATE_DIR)/code-stub-libraries.cc',
         '<(SHARED_INTERMEDIATE_DIR)/experimental-libraries.cc',
         '<(SHARED_INTERMEDIATE_DIR)/extras-libraries.cc',
         '<(INTERMEDIATE_DIR)/snapshot.cc',
@@ -224,6 +225,7 @@
       ],
       'sources': [
         '<(SHARED_INTERMEDIATE_DIR)/libraries.cc',
+        '<(SHARED_INTERMEDIATE_DIR)/code-stub-libraries.cc',
         '<(SHARED_INTERMEDIATE_DIR)/experimental-libraries.cc',
         '<(SHARED_INTERMEDIATE_DIR)/extras-libraries.cc',
         '../../src/snapshot/snapshot-empty.cc',
@@ -1685,6 +1687,7 @@
             'inputs': [
               '../../tools/concatenate-files.py',
               '<(SHARED_INTERMEDIATE_DIR)/libraries.bin',
+              '<(SHARED_INTERMEDIATE_DIR)/libraries-code-stub.bin',
               '<(SHARED_INTERMEDIATE_DIR)/libraries-experimental.bin',
               '<(SHARED_INTERMEDIATE_DIR)/libraries-extras.bin',
             ],
@@ -1795,7 +1798,13 @@
           '../../src/harmony-object.js',
           '../../src/harmony-sharedarraybuffer.js',
         ],
+        'code_stub_library_files': [
+          '../../src/macros.py',
+          '../../src/messages.h',
+          '../../src/code-stubs.js',
+        ],
         'libraries_bin_file': '<(SHARED_INTERMEDIATE_DIR)/libraries.bin',
+        'libraries_code_stub_bin_file': '<(SHARED_INTERMEDIATE_DIR)/libraries-code-stub.bin',
         'libraries_experimental_bin_file': '<(SHARED_INTERMEDIATE_DIR)/libraries-experimental.bin',
         'libraries_extras_bin_file': '<(SHARED_INTERMEDIATE_DIR)/libraries-extras.bin',
       },
@@ -1853,6 +1862,31 @@
           ],
         },
         {
+          'action_name': 'js2c_code_stubs',
+          'inputs': [
+            '../../tools/js2c.py',
+            '<@(code_stub_library_files)',
+          ],
+          'outputs': [
+            '<(SHARED_INTERMEDIATE_DIR)/code-stub-libraries.cc',
+          ],
+          'action': [
+            'python',
+            '../../tools/js2c.py',
+            '<(SHARED_INTERMEDIATE_DIR)/code-stub-libraries.cc',
+            'CODE_STUB',
+            '<@(code_stub_library_files)'
+          ],
+          'conditions': [
+            [ 'v8_use_external_startup_data==1', {
+              'outputs': ['<@(libraries_code_stub_bin_file)'],
+              'action': [
+                '--startup_blob', '<@(libraries_code_stub_bin_file)'
+              ],
+            }],
+          ],
+        },
+        {
           'action_name': 'js2c_extras',
           'inputs': [
             '../../tools/js2c.py',