[turbofan] Don't compute unneeded gray set in AllNodes.

test/cctest/compiler/test-osr.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/codegen.h"
 #include "src/compiler/all-nodes.h"
 #include "src/compiler/common-operator.h"
 #include "src/compiler/diamond.h"
 #include "src/compiler/graph.h"
 #include "src/compiler/js-graph.h"
@@ skipping 104 matching lines @@
   }
 
   void DeconstructOsr() {
     OsrHelper helper(0, 0);
     helper.Deconstruct(&jsgraph, &common, main_zone());
     AllNodes nodes(main_zone(), &graph);
     // Should be edited out.
     CHECK(!nodes.IsLive(osr_normal_entry));
     CHECK(!nodes.IsLive(osr_loop_entry));
     // No dangling nodes should be left over.
-    CHECK_EQ(0u, nodes.gray.size());
+    for (Node* const node : nodes.live) {
+      for (Node* const use : node->uses()) {
+        CHECK(std::find(nodes.live.begin(), nodes.live.end(), use) !=
+              nodes.live.end());
+      }
+    }
   }
 };
 
 
 TEST(Deconstruct_osr0) {
   OsrDeconstructorTester T(0);
 
   Node* loop = T.NewOsrLoop(1);
 
   T.graph.SetEnd(loop);
@@ skipping 341 matching lines @@
 
   // Check structure of inner loop.
   Node* new_inner_loop = FindSuccessor(new_outer_if_true, IrOpcode::kLoop);
   Node* new_inner_phi = FindSuccessor(new_inner_loop, IrOpcode::kPhi);
 
   CheckInputs(new_inner_phi, T.jsgraph.OneConstant(), T.jsgraph.ZeroConstant(),
               new_inner_loop);
   CheckInputs(new_outer_phi, new_entry_phi, new_inner_phi,
               T.jsgraph.ZeroConstant(), new_outer_loop);
 }