Disable concurrent osr when concurrent recompilation is disabled.

src/v8.cc

Index: src/v8.cc
diff --git a/src/v8.cc b/src/v8.cc
index 62330c32d482aa9a1a74ba70f38d769bfff240da..546d84bcdd3d350bfe8fefdf667a3245b54fe2a5 100644
--- a/src/v8.cc
+++ b/src/v8.cc
@@ -206,6 +206,7 @@ void V8::InitializeOncePerProcessImpl() {
   if (FLAG_concurrent_recompilation &&
       (FLAG_trace_hydrogen || FLAG_trace_hydrogen_stubs)) {
     FLAG_concurrent_recompilation = false;
+    FLAG_concurrent_osr = false;
     PrintF("Concurrent recompilation has been disabled for tracing.\n");
   }
 
@@ -231,6 +232,8 @@ void V8::InitializeOncePerProcessImpl() {
       SystemThreadManager::NumberOfParallelSystemThreads(
           SystemThreadManager::PARALLEL_RECOMPILATION) == 0) {
     FLAG_concurrent_recompilation = false;
+    FLAG_concurrent_osr = false;
+    CHECK(!verify_concurrency);
   }
 
   Sampler::SetUp();