[turbofan] Remove usage of Unique<T> from graph.

test/unittests/compiler/node-test-utils.cc

Index: test/unittests/compiler/node-test-utils.cc
diff --git a/test/unittests/compiler/node-test-utils.cc b/test/unittests/compiler/node-test-utils.cc
index d2b9a7362c56e8d90e3a4c796a1539373d412d69..7d91588cd2b07808cbcdb0b3fbe3cfae249558b0 100644
--- a/test/unittests/compiler/node-test-utils.cc
+++ b/test/unittests/compiler/node-test-utils.cc
@@ -21,6 +21,11 @@ using testing::StringMatchResultListener;
 
 namespace v8 {
 namespace internal {
+
+bool operator==(Handle<HeapObject> const& lhs, Handle<HeapObject> const& rhs) {
+  return lhs.is_identical_to(rhs);
+}
+
 namespace compiler {
 
 namespace {
@@ -1528,10 +1533,9 @@ Matcher<Node*> IsExternalConstant(
 }
 
 
-Matcher<Node*> IsHeapConstant(
-    const Matcher<Unique<HeapObject> >& value_matcher) {
-  return MakeMatcher(new IsConstantMatcher<Unique<HeapObject> >(
-      IrOpcode::kHeapConstant, value_matcher));
+Matcher<Node*> IsHeapConstant(Handle<HeapObject> value) {
+  return MakeMatcher(new IsConstantMatcher<Handle<HeapObject>>(
+      IrOpcode::kHeapConstant, value));
 }