Fix inspector test in components build

src/utils.h

 // 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.
 
 #ifndef V8_UTILS_H_
 #define V8_UTILS_H_
 
 #include <limits.h>
 #include <stdlib.h>
 #include <string.h>
@@ skipping 1132 matching lines @@
   }
 #endif
 
 #undef STOS
 }
 
 
 // Simple support to read a file into a 0-terminated C-string.
 // The returned buffer must be freed by the caller.
 // On return, *exits tells whether the file existed.
-Vector<const char> ReadFile(const char* filename,
-                            bool* exists,
-                            bool verbose = true);
+V8_EXPORT_PRIVATE Vector<const char> ReadFile(const char* filename,
+                                              bool* exists,
+                                              bool verbose = true);
 Vector<const char> ReadFile(FILE* file,
                             bool* exists,
                             bool verbose = true);
 
 
 template <typename sourcechar, typename sinkchar>
 INLINE(static void CopyCharsUnsigned(sinkchar* dest, const sourcechar* src,
                                      size_t chars));
 #if defined(V8_HOST_ARCH_ARM)
 INLINE(void CopyCharsUnsigned(uint8_t* dest, const uint8_t* src, size_t chars));
@@ skipping 428 matching lines @@
   byte* dst = reinterpret_cast<byte*>(p);
   for (size_t i = 0; i < sizeof(V); i++) {
     dst[i] = src[sizeof(V) - i - 1];
   }
 #endif  // V8_TARGET_LITTLE_ENDIAN
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_UTILS_H_