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

src/compiler/code-generator.cc

Index: src/compiler/code-generator.cc
diff --git a/src/compiler/code-generator.cc b/src/compiler/code-generator.cc
index 72c6ec984af552e9528ee8f126c64f2557e20c50..3a56ece0c0cf794fe97a4a53ea562d875d2df43d 100644
--- a/src/compiler/code-generator.cc
+++ b/src/compiler/code-generator.cc
@@ -281,7 +281,7 @@ void CodeGenerator::PopulateDeoptimizationData(Handle<Code> code_object) {
   for (int i = 0; i < deopt_count; i++) {
     DeoptimizationState* deoptimization_state = deoptimization_states_[i];
     data->SetAstId(i, deoptimization_state->bailout_id());
-    CHECK_NE(NULL, deoptimization_states_[i]);
+    CHECK(deoptimization_states_[i]);
     data->SetTranslationIndex(
         i, Smi::FromInt(deoptimization_states_[i]->translation_id()));
     data->SetArgumentsStackHeight(i, Smi::FromInt(0));