Revert "Make GCC happy again." and "Initial switch to Chromium-style CHECK_* and DCHECK_* macros.".

src/compiler/move-optimizer.cc

Index: src/compiler/move-optimizer.cc
diff --git a/src/compiler/move-optimizer.cc b/src/compiler/move-optimizer.cc
index 855256e92c75981ea3e332a84f2ddd492f8ad175..330f32f65d584fba17d082f3d72924c9d97a6f6c 100644
--- a/src/compiler/move-optimizer.cc
+++ b/src/compiler/move-optimizer.cc
@@ -83,11 +83,11 @@ static MoveOperands* PrepareInsertAfter(ParallelMove* left, MoveOperands* move,
   for (auto curr = move_ops->begin(); curr != move_ops->end(); ++curr) {
     if (curr->IsEliminated()) continue;
     if (curr->destination()->Equals(move->source())) {
-      DCHECK(!replacement);
+      DCHECK_EQ(nullptr, replacement);
       replacement = curr;
       if (to_eliminate != nullptr) break;
     } else if (curr->destination()->Equals(move->destination())) {
-      DCHECK(!to_eliminate);
+      DCHECK_EQ(nullptr, to_eliminate);
       to_eliminate = curr;
       if (replacement != nullptr) break;
     }