Make unittests work in component build

src/wasm/wasm-result.h

 // Copyright 2015 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.
 
 #ifndef V8_WASM_RESULT_H_
 #define V8_WASM_RESULT_H_
 
 #include <memory>
 
 #include "src/base/compiler-specific.h"
@@ skipping 64 matching lines @@
     } else {
       os << result.error_msg.get() << " @+" << offset;
     }
   } else {
     os << result.error_code;
   }
   os << std::endl;
   return os;
 }
 
-std::ostream& operator<<(std::ostream& os, const ErrorCode& error_code);
+V8_EXPORT_PRIVATE std::ostream& operator<<(std::ostream& os,
+                                           const ErrorCode& error_code);
 
 // A helper for generating error messages that bubble up to JS exceptions.
 class V8_EXPORT_PRIVATE ErrorThrower {
  public:
   ErrorThrower(i::Isolate* isolate, const char* context)
       : isolate_(isolate), context_(context) {}
   ~ErrorThrower();
 
   PRINTF_FORMAT(2, 3) void TypeError(const char* fmt, ...);
   PRINTF_FORMAT(2, 3) void RangeError(const char* fmt, ...);
@@ skipping 20 matching lines @@
 
   i::Isolate* isolate_;
   const char* context_;
   i::Handle<i::Object> exception_;
 };
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif