[turbofan] Introduce an ExternalPointer type.

test/cctest/compiler/test-js-typed-lowering.cc

Index: test/cctest/compiler/test-js-typed-lowering.cc
diff --git a/test/cctest/compiler/test-js-typed-lowering.cc b/test/cctest/compiler/test-js-typed-lowering.cc
index 8e0ccff27c9fe1b4c195cc1c1c2edbeeae0b4a8b..f504e549fdbc8d238bbb8faba01e9821d48ff44b 100644
--- a/test/cctest/compiler/test-js-typed-lowering.cc
+++ b/test/cctest/compiler/test-js-typed-lowering.cc
@@ -169,11 +169,6 @@ class JSTypedLoweringTester : public HandleAndZoneScope {
     CHECK_EQ(effect, NodeProperties::GetEffectInput(use));
   }
 
-  void CheckInt32Constant(int32_t expected, Node* result) {
-    CHECK_EQ(IrOpcode::kInt32Constant, result->opcode());
-    CHECK_EQ(expected, OpParameter<int32_t>(result));
-  }
-
   void CheckNumberConstant(double expected, Node* result) {
     CHECK_EQ(IrOpcode::kNumberConstant, result->opcode());
     CHECK_EQ(expected, OpParameter<double>(result));
@@ -694,7 +689,7 @@ TEST(RemoveToNumberEffects) {
   JSTypedLoweringTester R;
 
   Node* effect_use = NULL;
-  Node* zero = R.graph.NewNode(R.common.Int32Constant(0));
+  Node* zero = R.graph.NewNode(R.common.NumberConstant(0));
   for (int i = 0; i < 10; i++) {
     Node* p0 = R.Parameter(Type::Number());
     Node* ton = R.Unop(R.javascript.ToNumber(), p0);