Initial switch to Chromium-style CHECK_* and DCHECK_* macros.

src/compiler/value-numbering-reducer.cc

Index: src/compiler/value-numbering-reducer.cc
diff --git a/src/compiler/value-numbering-reducer.cc b/src/compiler/value-numbering-reducer.cc
index 734b3e8e8ee870f04b500e2f784849d95dd77505..d03aa82492b8817d10ba3bc1b54091937f292020 100644
--- a/src/compiler/value-numbering-reducer.cc
+++ b/src/compiler/value-numbering-reducer.cc
@@ -25,15 +25,15 @@ size_t HashCode(Node* node) {
 
 
 bool Equals(Node* a, Node* b) {
-  DCHECK_NOT_NULL(a);
-  DCHECK_NOT_NULL(b);
-  DCHECK_NOT_NULL(a->op());
-  DCHECK_NOT_NULL(b->op());
+  DCHECK(a);
+  DCHECK(b);
+  DCHECK(a->op());
+  DCHECK(b->op());
   if (!a->op()->Equals(b->op())) return false;
   if (a->InputCount() != b->InputCount()) return false;
   for (int j = 0; j < a->InputCount(); ++j) {
-    DCHECK_NOT_NULL(a->InputAt(j));
-    DCHECK_NOT_NULL(b->InputAt(j));
+    DCHECK(a->InputAt(j));
+    DCHECK(b->InputAt(j));
     if (a->InputAt(j)->id() != b->InputAt(j)->id()) return false;
   }
   return true;