[turbofan] Get rid of type lower bounds.

test/unittests/compiler/graph-unittest.cc

Index: test/unittests/compiler/graph-unittest.cc
diff --git a/test/unittests/compiler/graph-unittest.cc b/test/unittests/compiler/graph-unittest.cc
index 991ecc2f7c2f5de94b9695e7b9852bef7fbed31d..399f9853707bbd1b2cf3a44dbf4b29a3095635d2 100644
--- a/test/unittests/compiler/graph-unittest.cc
+++ b/test/unittests/compiler/graph-unittest.cc
@@ -55,7 +55,7 @@ Node* GraphTest::NumberConstant(volatile double value) {
 Node* GraphTest::HeapConstant(const Handle<HeapObject>& value) {
   Node* node = graph()->NewNode(common()->HeapConstant(value));
   Type* type = Type::Constant(value, zone());
-  NodeProperties::SetBounds(node, Bounds(type));
+  NodeProperties::SetType(node, type);
   return node;
 }
 
@@ -109,7 +109,7 @@ TypedGraphTest::~TypedGraphTest() {}
 
 Node* TypedGraphTest::Parameter(Type* type, int32_t index) {
   Node* node = GraphTest::Parameter(index);
-  NodeProperties::SetBounds(node, Bounds(type));
+  NodeProperties::SetType(node, type);
   return node;
 }