[complier] Enable parallel eager inner function compilation with compiler dispatcher.

src/compiler.h

Index: src/compiler.h
diff --git a/src/compiler.h b/src/compiler.h
index dfbd520f9d6508290fa565b35d7cee7e96286d88..051fd1e35f82726ca575d4d87ba4ea0d135e6938 100644
--- a/src/compiler.h
+++ b/src/compiler.h
@@ -37,7 +37,7 @@ class ThreadedListZoneEntry;
 // parameters which then can be executed. If the source code contains other
 // functions, they might be compiled and allocated as part of the compilation
 // of the source code or deferred for lazy compilation at a later point.
-class Compiler : public AllStatic {
+class V8_EXPORT_PRIVATE Compiler : public AllStatic {
  public:
   enum ClearExceptionFlag { KEEP_EXCEPTION, CLEAR_EXCEPTION };
   enum ConcurrencyMode { NOT_CONCURRENT, CONCURRENT };