Revert of Remove DCHECK_IMPLIES/CHECK_IMPLIES.

content/child/web_url_loader_impl.cc

Index: content/child/web_url_loader_impl.cc
diff --git a/content/child/web_url_loader_impl.cc b/content/child/web_url_loader_impl.cc
index bea6020f19d78d147d0c97f897c55cc09122adeb..193797b494a4960874347edd55c3134f2d890d75 100644
--- a/content/child/web_url_loader_impl.cc
+++ b/content/child/web_url_loader_impl.cc
@@ -450,10 +450,10 @@
   // 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());