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

src/assert-scope.cc

Index: src/assert-scope.cc
diff --git a/src/assert-scope.cc b/src/assert-scope.cc
index 4c10fddb91243a7fbf4d8cfc371ca2e88a28dba4..d97f13997eb670089a2b4295f988f638e60eabaf 100644
--- a/src/assert-scope.cc
+++ b/src/assert-scope.cc
@@ -82,7 +82,7 @@ PerThreadAssertScope<kType, kAllow>::PerThreadAssertScope()
 
 template <PerThreadAssertType kType, bool kAllow>
 PerThreadAssertScope<kType, kAllow>::~PerThreadAssertScope() {
-  DCHECK_NOT_NULL(data_);
+  DCHECK(data_);
   data_->Set(kType, old_state_);
   if (data_->DecrementLevel()) {
     PerThreadAssertData::SetCurrent(NULL);
@@ -107,7 +107,7 @@ class PerIsolateAssertScope<kType, kAllow>::DataBit
 template <PerIsolateAssertType kType, bool kAllow>
 PerIsolateAssertScope<kType, kAllow>::PerIsolateAssertScope(Isolate* isolate)
     : isolate_(isolate), old_data_(isolate->per_isolate_assert_data()) {
-  DCHECK_NOT_NULL(isolate);
+  DCHECK(isolate);
   STATIC_ASSERT(kType < 32);
   isolate_->set_per_isolate_assert_data(DataBit::update(old_data_, kAllow));
 }