MIPS: Simplify stack check instruction in Crankshaft.

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 81a193a62f66fb36f3ec6b7d633481627f02ff49..da7a8e6a9c685b2bf9d42e646df4246f44b41ae1 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -2197,12 +2197,7 @@ LInstruction* LChunkBuilder::DoSimulate(HSimulate* instr) {
 
 
 LInstruction* LChunkBuilder::DoStackCheck(HStackCheck* instr) {
-  if (instr->is_function_entry()) {
-    return MarkAsCall(new LStackCheck, instr);
-  } else {
-    ASSERT(instr->is_backwards_branch());
-    return AssignEnvironment(AssignPointerMap(new LStackCheck));
-  }
+  return AssignEnvironment(AssignPointerMap(new LStackCheck));
 }