Infrastructure for reading V8's initial snapshot from external files

content/content_shell.gypi

Index: content/content_shell.gypi
diff --git a/content/content_shell.gypi b/content/content_shell.gypi
index f03545562552396ba6df5b555ab4245cde09c6b9..6cb7fff23d6058ba564646c3434417d921de32cc 100644
--- a/content/content_shell.gypi
+++ b/content/content_shell.gypi
@@ -1048,6 +1048,7 @@
           'dependencies': [
             'content.gyp:content_icudata',
             'content.gyp:content_java',
+            'content.gyp:content_v8_external_data',
             'content_java_test_support',
             'content_shell_java',
             'libcontent_shell_content_view',
@@ -1073,6 +1074,12 @@
                   '<(PRODUCT_DIR)/icudtl.dat',
                 ],
               }],
+              ['v8_use_external_startup_data==1', {
+                'additional_input_paths': [
+                  '<(PRODUCT_DIR)/natives_blob.bin',
+                  '<(PRODUCT_DIR)/snapshot_blob.bin',
+                ],
+              }],
             ],
           },
           'conditions': [