Fix Initialize & Dispose for external snapshot.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 5344 matching lines @@
 }
 
 
 void v8::V8::ShutdownPlatform() {
   i::V8::ShutdownPlatform();
 }
 
 
 bool v8::V8::Initialize() {
   i::V8::Initialize();
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+  i::ReadNatives();
+#endif
   return true;
 }
 
 
 void v8::V8::SetEntropySource(EntropySource entropy_source) {
   base::RandomNumberGenerator::SetEntropySource(entropy_source);
 }
 
 
 void v8::V8::SetReturnAddressLocationResolver(
@@ skipping 2627 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal