Address Florian's comments: use restricted lazy deoptimization, fix typo.

runtime/vm/class_finalizer.cc

Index: runtime/vm/class_finalizer.cc
===================================================================
--- runtime/vm/class_finalizer.cc	(revision 14934)
+++ runtime/vm/class_finalizer.cc	(working copy)
@@ -33,13 +33,13 @@
 // Removes optimized code once we load more classes, since --use_cha based
 // optimizations may have become invalid.
 // Only methods which owner classes where subclasses can be invalid.
-// TODO(srdjan): Be even more precise by recording the exact CHA optimziation.
+// TODO(srdjan): Be even more precise by recording the exact CHA optimization.
 static void RemoveOptimizedCode(
     const GrowableArray<intptr_t>& added_subclasses_to_cids) {
   ASSERT(FLAG_use_cha);
   if (added_subclasses_to_cids.is_empty()) return;
   // Deoptimize all live frames.
-  DeoptimizeAll();
+  DeoptimizeIfOwner(added_subclasses_to_cids);
   // Switch all functions' code to unoptimized.
   const ClassTable& class_table = *Isolate::Current()->class_table();
   Class& cls = Class::Handle();