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

test/cctest/trace-extension.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 112 matching lines @@
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
   i::VMState<EXTERNAL> state(isolate);
   Address address = reinterpret_cast<Address>(
       reinterpret_cast<intptr_t>(&TraceExtension::JSTrace));
   i::ExternalCallbackScope call_scope(isolate, address);
   DoTraceHideCEntryFPAddress(GetFP(args));
 }
 
 
 Address TraceExtension::GetJsEntrySp() {
-  CHECK_NE(NULL, CcTest::i_isolate()->thread_local_top());
+  CHECK(CcTest::i_isolate()->thread_local_top());
   return CcTest::i_isolate()->js_entry_sp();
 }
 
 
 void TraceExtension::JSEntrySP(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
-  CHECK_NE(0, GetJsEntrySp());
+  CHECK(GetJsEntrySp());
 }
 
 
 void TraceExtension::JSEntrySPLevel2(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   v8::HandleScope scope(args.GetIsolate());
   const Address js_entry_sp = GetJsEntrySp();
-  CHECK_NE(0, js_entry_sp);
+  CHECK(js_entry_sp);
   CompileRun("js_entry_sp();");
   CHECK_EQ(js_entry_sp, GetJsEntrySp());
 }
 
 
 } }  // namespace v8::internal