Ensure CheckInitialized is present independent of define.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2903 matching lines @@
     LOG_API(isolate, "ToInteger");
     ENTER_V8(isolate);
     EXCEPTION_PREAMBLE(isolate);
     num = i::Execution::ToInteger(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<Integer>());
   }
   return ToApiHandle<Integer>(num);
 }
 
 
-#ifdef V8_ENABLE_CHECKS
-void i::Internals::CheckInitialized(v8::Isolate* external_isolate) {
+void i::Internals::CheckInitializedImpl(v8::Isolate* external_isolate) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(external_isolate);
   ApiCheck(isolate != NULL && isolate->IsInitialized() && !i::V8::IsDead(),
            "v8::internal::Internals::CheckInitialized()",
            "Isolate is not initialized or V8 has died");
 }
-#endif
 
 
 void External::CheckCast(v8::Value* that) {
   if (IsDeadCheck(i::Isolate::Current(), "v8::External::Cast()")) return;
   ApiCheck(Utils::OpenHandle(that)->IsExternal(),
            "v8::External::Cast()",
            "Could not convert to external");
 }
 
 
@@ skipping 5077 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);
   return callback(info);
 }
 
 
 } }  // namespace v8::internal