Addressed perf regression in Browsermark2.0 array blur test

src/allocation-site-scopes.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 64 matching lines @@
       } else {
         PrintF("Setting AllocationSite (%p, %p) transition_info %p\n",
                static_cast<void*>(*top()),
                static_cast<void*>(*scope_site),
                static_cast<void*>(*object));
       }
     }
   }
 }
 
-
-Handle<AllocationSite> AllocationSiteUsageContext::EnterNewScope() {
-  if (top().is_null()) {
-    InitializeTraversal(top_site_);
-  } else {
-    // Advance current site
-    Object* nested_site = current()->nested_site();
-    // Something is wrong if we advance to the end of the list here.
-    ASSERT(nested_site->IsAllocationSite());
-    update_current_site(AllocationSite::cast(nested_site));
-  }
-  return Handle<AllocationSite>(*current(), isolate());
-}
-
-
-void AllocationSiteUsageContext::ExitScope(
-    Handle<AllocationSite> scope_site,
-    Handle<JSObject> object) {
-  // This assert ensures that we are pointing at the right sub-object in a
-  // recursive walk of a nested literal.
-  ASSERT(object.is_null() || *object == scope_site->transition_info());
-}
-
 } }  // namespace v8::internal