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

src/ostreams.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ostreams.h"
 
 #if V8_OS_WIN
 #define snprintf sprintf_s
 #endif
 
@@ skipping 17 matching lines @@
 }
 
 
 std::streamsize OFStreamBase::xsputn(const char* s, std::streamsize n) {
   return static_cast<std::streamsize>(
       std::fwrite(s, 1, static_cast<size_t>(n), f_));
 }
 
 
 OFStream::OFStream(FILE* f) : std::ostream(nullptr), buf_(f) {
-  DCHECK_NOT_NULL(f);
+  DCHECK(f);
   rdbuf(&buf_);
 }
 
 
 OFStream::~OFStream() {}
 
 
 namespace {
 
 // Locale-independent predicates.
@@ skipping 25 matching lines @@
   return PrintUC16(os, c.value, IsOK);
 }
 
 
 std::ostream& operator<<(std::ostream& os, const AsUC16& c) {
   return PrintUC16(os, c.value, IsPrint);
 }
 
 }  // namespace internal
 }  // namespace v8