Make unittests work in component build

src/handles.h

 // Copyright 2011 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_HANDLES_H_
 #define V8_HANDLES_H_
 
 #include "include/v8.h"
 #include "src/base/functional.h"
 #include "src/base/macros.h"
@@ skipping 322 matching lines @@
 template <typename V>
 class IdentityMap;
 class RootIndexMap;
 
 
 // A CanonicalHandleScope does not open a new HandleScope. It changes the
 // existing HandleScope so that Handles created within are canonicalized.
 // This does not apply to nested inner HandleScopes unless a nested
 // CanonicalHandleScope is introduced. Handles are only canonicalized within
 // the same CanonicalHandleScope, but not across nested ones.
-class CanonicalHandleScope final {
+class V8_EXPORT_PRIVATE CanonicalHandleScope final {
  public:
   explicit CanonicalHandleScope(Isolate* isolate);
   ~CanonicalHandleScope();
 
  private:
-  V8_EXPORT_PRIVATE Object** Lookup(Object* object);
+  Object** Lookup(Object* object);
 
   Isolate* isolate_;
   Zone zone_;
   RootIndexMap* root_index_map_;
   IdentityMap<Object**>* identity_map_;
   // Ordinary nested handle scopes within the current one are not canonical.
   int canonical_level_;
   // We may have nested canonical scopes. Handles are canonical within each one.
   CanonicalHandleScope* prev_canonical_scope_;
 
@@ skipping 53 matching lines @@
     next = limit = NULL;
     sealed_level = level = 0;
     canonical_scope = NULL;
   }
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HANDLES_H_