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

test/cctest/test-log-stack-tracer.cc

 // Copyright 2011 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 258 matching lines @@
   v8::Context::Scope context_scope(context);
   // Check that sampler doesn't crash
   CHECK_EQ(10, CFunc(10));
 }
 
 
 TEST(JsEntrySp) {
   v8::HandleScope scope(CcTest::isolate());
   v8::Local<v8::Context> context = CcTest::NewContext(TRACE_EXTENSION);
   v8::Context::Scope context_scope(context);
-  CHECK_EQ(0, i::TraceExtension::GetJsEntrySp());
+  CHECK(!i::TraceExtension::GetJsEntrySp());
   CompileRun("a = 1; b = a + 1;");
-  CHECK_EQ(0, i::TraceExtension::GetJsEntrySp());
+  CHECK(!i::TraceExtension::GetJsEntrySp());
   CompileRun("js_entry_sp();");
-  CHECK_EQ(0, i::TraceExtension::GetJsEntrySp());
+  CHECK(!i::TraceExtension::GetJsEntrySp());
   CompileRun("js_entry_sp_level2();");
-  CHECK_EQ(0, i::TraceExtension::GetJsEntrySp());
+  CHECK(!i::TraceExtension::GetJsEntrySp());
 }