Make unittests work in component build

src/compiler/scheduler.h

Index: src/compiler/scheduler.h
diff --git a/src/compiler/scheduler.h b/src/compiler/scheduler.h
index 88e5a3ac949cc6471d30e53323e833de69544cec..1a08e4c0195b9abaebb55f32a91d2d088ffab36a 100644
--- a/src/compiler/scheduler.h
+++ b/src/compiler/scheduler.h
@@ -10,6 +10,7 @@
 #include "src/compiler/opcodes.h"
 #include "src/compiler/schedule.h"
 #include "src/compiler/zone-stats.h"
+#include "src/globals.h"
 #include "src/zone/zone-containers.h"
 
 namespace v8 {
@@ -25,7 +26,7 @@ class SpecialRPONumberer;
 
 // Computes a schedule from a graph, placing nodes into basic blocks and
 // ordering the basic blocks in the special RPO order.
-class Scheduler {
+class V8_EXPORT_PRIVATE Scheduler {
  public:
   // Flags that control the mode of operation.
   enum Flag { kNoFlags = 0u, kSplitNodes = 1u << 1 };