Allow to enable/disable inline allocation via runtime function.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 55b270c16fb24e335ccb4abd47b8b4e27851e67e..3fb886c149972d546decdebab25c19fa72765d26 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -8744,12 +8744,21 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileForOnStackReplacement) {
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_SetAllocationTimeout) {
   SealHandleScope shs(isolate);
-  ASSERT(args.length() == 2);
+  ASSERT(args.length() == 2 || args.length() == 3);
 #ifdef DEBUG
   CONVERT_SMI_ARG_CHECKED(interval, 0);
   CONVERT_SMI_ARG_CHECKED(timeout, 1);
   isolate->heap()->set_allocation_timeout(timeout);
   FLAG_gc_interval = interval;
+  if (args.length() == 3) {
+    // Enable/disable inline allocation if requested.
+    CONVERT_BOOLEAN_ARG_CHECKED(inline_allocation, 2);
+    if (inline_allocation) {
+      isolate->heap()->EnableInlineAllocation();
+    } else {
+      isolate->heap()->DisableInlineAllocation();
+    }
+  }
 #endif
   return isolate->heap()->undefined_value();
 }