Return Object* instead of MaybeObject* from runtime calls.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index d8bb3aee941f5bf41cfa51fd2be0bbc165b170c1..fd0c0390b396e309b5e690035a1b67891645c068 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -1482,12 +1482,6 @@ class CEntryStub : public PlatformCodeStub {
   };
 
  private:
-  void GenerateCore(MacroAssembler* masm,
-                    Label* throw_normal_exception,
-                    Label* throw_termination_exception,
-                    bool do_gc,
-                    bool always_allocate_scope);
-
   // Number of pointers/values returned.
   Isolate* isolate_;
   const int result_size_;