Always invoke C++ ArrayPush builtin.

src/stub-cache.h

 // Copyright 2006-2008 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 308 matching lines @@
 Handle<Code> ComputeCallMiss(int argc);
 
 
 // The stub compiler compiles stubs for the stub cache.
 class StubCompiler BASE_EMBEDDED {
  public:
   enum CheckType {
     RECEIVER_MAP_CHECK,
     STRING_CHECK,
     NUMBER_CHECK,
-    BOOLEAN_CHECK,
-    JSARRAY_HAS_FAST_ELEMENTS_CHECK
+    BOOLEAN_CHECK
   };
 
   StubCompiler() : scope_(), masm_(NULL, 256), failure_(NULL) { }
 
   Object* CompileCallInitialize(Code::Flags flags);
   Object* CompileCallPreMonomorphic(Code::Flags flags);
   Object* CompileCallNormal(Code::Flags flags);
   Object* CompileCallMegamorphic(Code::Flags flags);
   Object* CompileCallMiss(Code::Flags flags);
 #ifdef ENABLE_DEBUGGER_SUPPORT
@@ skipping 246 matching lines @@
   Object* CompileConstructStub(SharedFunctionInfo* shared);
 
  private:
   Object* GetCode();
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_