Merged r15196, r15203, r15204, r15207, r15214 into trunk branch.

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 0c744caee4a62a2af91a2defd368886be4a9c415..0b7a7ca3bb9414a4e08c4225bed9192ac85ee561 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -8265,9 +8265,6 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileForOnStackReplacement) {
                                    *interrupt_code,
                                    *replacement_code);
 
-  // Allow OSR only at nesting level zero again.
-  unoptimized->set_allow_osr_at_loop_nesting_level(0);
-
   // If the optimization attempt succeeded, return the AST id tagged as a
   // smi. This tells the builtin that we need to translate the unoptimized
   // frame to an optimized one.