Fixed Accessors::FunctionGetPrototype's proto chain traversal.

test/mjsunit/regress/regress-143967.js

Index: test/mjsunit/regress/regress-143967.js
diff --git a/src/platform-posix.h b/test/mjsunit/regress/regress-143967.js
similarity index 83%
copy from src/platform-posix.h
copy to test/mjsunit/regress/regress-143967.js
index 7a982ed2ef3080dad77860d6f46b356a9067bf3b..7c12e67153378ee866bc9c1df73ec5719700472c 100644
--- a/src/platform-posix.h
+++ b/test/mjsunit/regress/regress-143967.js
@@ -25,15 +25,10 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_PLATFORM_POSIX_H_
-#define V8_PLATFORM_POSIX_H_
+// Check that Accessors::FunctionGetPrototype traverses the prototype
+// chain correctly and doesn't get stuck.
 
-namespace v8 {
-namespace internal {
-
-// Used by platform implementation files during OS::PostSetUp().
-void POSIXPostSetUp();
-
-} }  // namespace v8::internal
-
-#endif  // V8_PLATFORM_POSIX_H_
+var functionWithoutProto = [].filter;
+var obj = Object.create(functionWithoutProto);
+functionWithoutProto.__proto__ = function() {};
+assertEquals(functionWithoutProto.prototype, obj.prototype);