Remove dependency on Chromium in diagnostic_logging.h.

webrtc/base/checks.h

 /*
  *  Copyright 2006 The WebRTC 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 in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_BASE_CHECKS_H_
 #define WEBRTC_BASE_CHECKS_H_
 
 #include <sstream>
 #include <string>
 
-#ifdef WEBRTC_CHROMIUM_BUILD
-// Include logging.h in a Chromium build to enable the overrides mechanism for
-// using Chromium's macros. Otherwise, don't depend on logging.h.
-// TODO(ajm): Ideally, checks.h would be combined with logging.h, but
-// consolidation with system_wrappers/logging.h should happen first.
-#include "webrtc/base/logging.h"
-#endif
 #include "webrtc/typedefs.h"
 
 // The macros here print a message to stderr and abort under various
 // conditions. All will accept additional stream messages. For example:
 // RTC_DCHECK_EQ(foo, bar) << "I'm printed when foo != bar.";
 //
 // - RTC_CHECK(x) is an assertion that x is always true, and that if it isn't,
 //   it's better to terminate the process than to continue. During development,
 //   the reason that it's better to terminate might simply be that the error
 //   handling code isn't in place yet; in production, the reason might be that
@@ skipping 18 matching lines @@
 //   RTC_DCHECK only evaluates its argument in debug builds, so if x has visible
 //   side effects, you need to write e.g.
 //     bool w = x; RTC_DCHECK(w);
 //
 // - RTC_CHECK_EQ, _NE, _GT, ..., and RTC_DCHECK_EQ, _NE, _GT, ... are
 //   specialized variants of RTC_CHECK and RTC_DCHECK that print prettier
 //   messages if the condition doesn't hold. Prefer them to raw RTC_CHECK and
 //   RTC_DCHECK.
 //
 // - FATAL() aborts unconditionally.
+//
+// TODO(ajm): Ideally, checks.h would be combined with logging.h, but
+// consolidation with system_wrappers/logging.h should happen first.
 
 namespace rtc {
 
 // Helper macro which avoids evaluating the arguments to a stream if
 // the condition doesn't hold.
 #define RTC_LAZY_STREAM(stream, condition)                                    \
   !(condition) ? static_cast<void>(0) : rtc::FatalMessageVoidify() & (stream)
 
 // The actual stream used isn't important. We reference condition in the code
 // but don't evaluate it; this is to avoid "unused variable" warnings (we do so
@@ skipping 150 matching lines @@
 // remainder is zero.
 template <typename T>
 inline T CheckedDivExact(T a, T b) {
   RTC_CHECK_EQ(a % b, static_cast<T>(0));
   return a / b;
 }
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_CHECKS_H_