Revert of Remove support for thread-based recompilation

src/runtime/runtime-compiler.cc

Index: src/runtime/runtime-compiler.cc
diff --git a/src/runtime/runtime-compiler.cc b/src/runtime/runtime-compiler.cc
index aa007b7ebb6ce903091c735a5d218564415cd6dd..d8512fdfb540b546badd2fe7e72303fd629ce27f 100644
--- a/src/runtime/runtime-compiler.cc
+++ b/src/runtime/runtime-compiler.cc
@@ -232,8 +232,7 @@ RUNTIME_FUNCTION(Runtime_CompileForOnStackReplacement) {
     // Gate the OSR entry with a stack check.
     BackEdgeTable::AddStackCheck(caller_code, pc_offset);
     // Poll already queued compilation jobs.
-    OptimizingCompileDispatcher* thread =
-        isolate->optimizing_compile_dispatcher();
+    OptimizingCompilerThread* thread = isolate->optimizing_compiler_thread();
     if (thread->IsQueuedForOSR(function, ast_id)) {
       if (FLAG_trace_osr) {
         PrintF("[OSR - Still waiting for queued: ");
@@ -325,7 +324,7 @@ RUNTIME_FUNCTION(Runtime_TryInstallOptimizedCode) {
     return isolate->StackOverflow();
   }
 
-  isolate->optimizing_compile_dispatcher()->InstallOptimizedFunctions();
+  isolate->optimizing_compiler_thread()->InstallOptimizedFunctions();
   return (function->IsOptimized()) ? function->code()
                                    : function->shared()->code();
 }