Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

content/child/web_url_loader_impl.cc

 // Copyright 2014 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.
 
 #include "content/child/web_url_loader_impl.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 432 matching lines @@
           ::blink::WebTraceLocation(__FUNCTION__, __FILE__),
           new HandleDataURLTask(this));
     }
     return;
   }
 
   // PlzNavigate: outside of tests, the only navigation requests going through
   // the WebURLLoader are the ones created by CommitNavigation. Several browser
   // tests load HTML directly through a data url which will be handled by the
   // block above.
-  DCHECK(!base::CommandLine::ForCurrentProcess()->HasSwitch(
-             switches::kEnableBrowserSideNavigation) ||
-         stream_override_.get() ||
-         request.frameType() == WebURLRequest::FrameTypeNone);
+  DCHECK_IMPLIES(base::CommandLine::ForCurrentProcess()->HasSwitch(
+                     switches::kEnableBrowserSideNavigation),
+                 stream_override_.get() ||
+                     request.frameType() == WebURLRequest::FrameTypeNone);
 
   GURL referrer_url(
       request.httpHeaderField(WebString::fromUTF8("Referer")).latin1());
   const std::string& method = request.httpMethod().latin1();
 
   // TODO(brettw) this should take parameter encoding into account when
   // creating the GURLs.
 
   // TODO(horo): Check credentials flag is unset when credentials mode is omit.
   //             Check credentials flag is set when credentials mode is include.
@@ skipping 624 matching lines @@
 }
 
 void WebURLLoaderImpl::setLoadingTaskRunner(
     blink::WebTaskRunner* loading_task_runner) {
   // There's no guarantee on the lifetime of |loading_task_runner| so we take a
   // copy.
   context_->SetWebTaskRunner(make_scoped_ptr(loading_task_runner->clone()));
 }
 
 }  // namespace content