Convert GURL::{host,path} to GURL::{host_piece,path_piece} for ==.

components/url_formatter/url_formatter.cc

Index: components/url_formatter/url_formatter.cc
diff --git a/components/url_formatter/url_formatter.cc b/components/url_formatter/url_formatter.cc
index 59b072033454744a22f4e662f6ecb3ea5324bfbd..43b53412202bea9b87c8d46a6dccd4a85ceb626d 100644
--- a/components/url_formatter/url_formatter.cc
+++ b/components/url_formatter/url_formatter.cc
@@ -778,7 +778,7 @@ bool CanStripTrailingSlash(const GURL& url) {
   // Omit the path only for standard, non-file URLs with nothing but "/" after
   // the hostname.
   return url.IsStandard() && !url.SchemeIsFile() && !url.SchemeIsFileSystem() &&
-         !url.has_query() && !url.has_ref() && url.path() == "/";
+         !url.has_query() && !url.has_ref() && url.path_piece() == "/";
 }
 
 void AppendFormattedHost(const GURL& url, base::string16* output) {