Retire concurrent recompilation delay for non-stress testing.

test/mjsunit/regress/regress-prepare-break-while-recompile.js

Index: test/mjsunit/regress/regress-prepare-break-while-recompile.js
diff --git a/test/mjsunit/regress/regress-prepare-break-while-recompile.js b/test/mjsunit/regress/regress-prepare-break-while-recompile.js
index 2fad5ca0d295c71601393609d8f6fd9622ec7f7d..a9c20ec844b69750169422b0b55b4e649cc7dcee 100644
--- a/test/mjsunit/regress/regress-prepare-break-while-recompile.js
+++ b/test/mjsunit/regress/regress-prepare-break-while-recompile.js
@@ -26,7 +26,7 @@
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 // Flags: --expose-debug-as debug --allow-natives-syntax
-// Flags: --concurrent-recompilation-delay=300
+// Flags: --block-concurrent-recompilation
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");
@@ -46,17 +46,22 @@ function bar() {
 }
 
 foo();
-// Mark and trigger concurrent optimization.
+// Mark and kick off recompilation.
 %OptimizeFunctionOnNextCall(foo, "concurrent");
 foo();
 
 // Set break points on an unrelated function. This clears both optimized
 // and (shared) unoptimized code on foo, and sets both to lazy-compile builtin.
 // Clear the break point immediately after to deactivate the debugger.
+// Do all of this after compile graph has been created.
 Debug.setBreakPoint(bar, 0, 0);
 Debug.clearAllBreakPoints();
 
+// At this point, concurrent recompilation is still blocked.
+assertUnoptimized(foo, "no sync");
+// Let concurrent recompilation proceed.
+%UnblockConcurrentRecompilation();
+
 // Install optimized code when concurrent optimization finishes.
 // This needs to be able to deal with shared code being a builtin.
 assertUnoptimized(foo, "sync");
-