Use DCHECK_EQ() when comparing TimeDeltas.

net/http/http_response_headers.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // The rules for header parsing were borrowed from Firefox:
 // http://lxr.mozilla.org/seamonkey/source/netwerk/protocol/http/src/nsHttpResponseHead.cpp
 // The rules for parsing content-types were also borrowed from Firefox:
 // http://lxr.mozilla.org/mozilla/source/netwerk/base/src/nsURLHelper.cpp#834
 
 #include "net/http/http_response_headers.h"
@@ skipping 1003 matching lines @@
       HasHeaderValue("pragma", "no-cache") ||
       // Vary: * is never usable: see RFC 2616 section 13.6.
       HasHeaderValue("vary", "*")) {
     return lifetimes;
   }
 
   // Cache-Control directive must_revalidate overrides stale-while-revalidate.
   bool must_revalidate = HasHeaderValue("cache-control", "must-revalidate");
 
   if (must_revalidate || !GetStaleWhileRevalidateValue(&lifetimes.staleness)) {
-    DCHECK(lifetimes.staleness == TimeDelta());
+    DCHECK_EQ(TimeDelta(), lifetimes.staleness);
   }
 
   // NOTE: "Cache-Control: max-age" overrides Expires, so we only check the
   // Expires header after checking for max-age in GetFreshnessLifetimes.  This
   // is important since "Expires: <date in the past>" means not fresh, but
   // it should not trump a max-age value.
   if (GetMaxAgeValue(&lifetimes.freshness))
     return lifetimes;
 
   // If there is no Date header, then assume that the server response was
   // generated at the time when we received the response.
   Time date_value;
   if (!GetDateValue(&date_value))
     date_value = response_time;
 
   Time expires_value;
   if (GetExpiresValue(&expires_value)) {
     // The expires value can be a date in the past!
     if (expires_value > date_value) {
       lifetimes.freshness = expires_value - date_value;
       return lifetimes;
     }
 
-    DCHECK(lifetimes.freshness == TimeDelta());
+    DCHECK_EQ(TimeDelta(), lifetimes.freshness);
     return lifetimes;
   }
 
   // From RFC 2616 section 13.4:
   //
   //   A response received with a status code of 200, 203, 206, 300, 301 or 410
   //   MAY be stored by a cache and used in reply to a subsequent request,
   //   subject to the expiration mechanism, unless a cache-control directive
   //   prohibits caching.
   //   ...
@@ skipping 31 matching lines @@
   if (response_code_ == 300 || response_code_ == 301 || response_code_ == 308 ||
       response_code_ == 410) {
     lifetimes.freshness = TimeDelta::Max();
     lifetimes.staleness = TimeDelta();  // It should never be stale.
     return lifetimes;
   }
 
   // Our heuristic freshness estimate for this resource is 0 seconds, in
   // accordance with common browser behaviour. However, stale-while-revalidate
   // may still apply.
-  DCHECK(lifetimes.freshness == TimeDelta());
+  DCHECK_EQ(TimeDelta(), lifetimes.freshness);
   return lifetimes;
 }
 
 // From RFC 2616 section 13.2.3:
 //
 // Summary of age calculation algorithm, when a cache receives a response:
 //
 //   /*
 //    * age_value
 //    *      is the value of Age: header received by the cache with
@@ skipping 332 matching lines @@
   return true;
 }
 
 bool HttpResponseHeaders::IsChunkEncoded() const {
   // Ignore spurious chunked responses from HTTP/1.0 servers and proxies.
   return GetHttpVersion() >= HttpVersion(1, 1) &&
       HasHeaderValue("Transfer-Encoding", "chunked");
 }
 
 }  // namespace net