Replace some hard coded schemes with the constants in /url/url_constants.h.

url/url_canon_stdurl.cc

Index: url/url_canon_stdurl.cc
diff --git a/url/url_canon_stdurl.cc b/url/url_canon_stdurl.cc
index 1f5000e72c6dbad1a03ea29152ce4c8a19083d76..7a61de8902d7e555fead2fe771bbe2c9fb5fcd87 100644
--- a/url/url_canon_stdurl.cc
+++ b/url/url_canon_stdurl.cc
@@ -7,6 +7,7 @@
 
 #include "url/url_canon.h"
 #include "url/url_canon_internal.h"
+#include "url/url_constants.h"
 
 namespace url {
 
@@ -98,25 +99,25 @@ int DefaultPortForScheme(const char* scheme, int scheme_len) {
   int default_port = PORT_UNSPECIFIED;
   switch (scheme_len) {
     case 4:
-      if (!strncmp(scheme, "http", scheme_len))
+      if (!strncmp(scheme, kHttpScheme, scheme_len))
         default_port = 80;
       break;
     case 5:
-      if (!strncmp(scheme, "https", scheme_len))
+      if (!strncmp(scheme, kHttpsScheme, scheme_len))
         default_port = 443;
       break;
     case 3:
-      if (!strncmp(scheme, "ftp", scheme_len))
+      if (!strncmp(scheme, kFtpScheme, scheme_len))
         default_port = 21;
-      else if (!strncmp(scheme, "wss", scheme_len))
+      else if (!strncmp(scheme, kWssScheme, scheme_len))
         default_port = 443;
       break;
     case 6:
-      if (!strncmp(scheme, "gopher", scheme_len))
+      if (!strncmp(scheme, kGopherScheme, scheme_len))
         default_port = 70;
       break;
     case 2:
-      if (!strncmp(scheme, "ws", scheme_len))
+      if (!strncmp(scheme, kWsScheme, scheme_len))
         default_port = 80;
       break;
   }