Fix shared library build.

src/d8.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.
 
 
 // Defined when linking against shared lib on Windows.
 #if defined(USING_V8_SHARED) && !defined(V8_SHARED)
 #define V8_SHARED
 #endif
 
@@ skipping 48 matching lines @@
 #include <windows.h>  // NOLINT
 #if defined(_MSC_VER)
 #include <crtdbg.h>  // NOLINT
 #endif               // defined(_MSC_VER)
 #endif               // !defined(_WIN32) && !defined(_WIN64)
 
 #ifndef DCHECK
 #define DCHECK(condition) assert(condition)
 #endif
 
+#ifndef CHECK
+#define CHECK(condition) assert(condition)
+#endif
+
 namespace v8 {
 
 
 static Handle<Value> Throw(Isolate* isolate, const char* message) {
   return isolate->ThrowException(String::NewFromUtf8(isolate, message));
 }
 
 
 
 class PerIsolateData {
@@ skipping 1614 matching lines @@
 }
 
 }  // namespace v8
 
 
 #ifndef GOOGLE3
 int main(int argc, char* argv[]) {
   return v8::Shell::Main(argc, argv);
 }
 #endif