Make unittests work in component build

src/compiler/graph-trimmer.h

Index: src/compiler/graph-trimmer.h
diff --git a/src/compiler/graph-trimmer.h b/src/compiler/graph-trimmer.h
index 98d335a44df22eba6db95c7dad2a356869dfdaf6..e57dc18b5e0ec1f8e8741e3a7e3d33dd97e6fafc 100644
--- a/src/compiler/graph-trimmer.h
+++ b/src/compiler/graph-trimmer.h
@@ -6,6 +6,7 @@
 #define V8_COMPILER_GRAPH_TRIMMER_H_
 
 #include "src/compiler/node-marker.h"
+#include "src/globals.h"
 
 namespace v8 {
 namespace internal {
@@ -16,7 +17,7 @@ class Graph;
 
 
 // Trims dead nodes from the node graph.
-class GraphTrimmer final {
+class V8_EXPORT_PRIVATE GraphTrimmer final {
  public:
   GraphTrimmer(Zone* zone, Graph* graph);
   ~GraphTrimmer();