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

url/gurl.h

 // Copyright 2013 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.
 
 #ifndef URL_GURL_H_
 #define URL_GURL_H_
 
 #include <iosfwd>
 #include <string>
 
@@ skipping 204 matching lines @@
 
   // Returns true if the scheme is "http" or "https".
   bool SchemeIsHTTPOrHTTPS() const;
 
   // Returns true is the scheme is "ws" or "wss".
   bool SchemeIsWSOrWSS() const;
 
   // We often need to know if this is a file URL. File URLs are "standard", but
   // are often treated separately by some programs.
   bool SchemeIsFile() const {
-    return SchemeIs("file");
+    return SchemeIs(url::kFileScheme);
   }
 
   // FileSystem URLs need to be treated differently in some cases.
   bool SchemeIsFileSystem() const {
-    return SchemeIs("filesystem");
+    return SchemeIs(url::kFileSystemScheme);
   }
 
   // If the scheme indicates a secure connection
   bool SchemeIsSecure() const {
     return SchemeIs(url::kHttpsScheme) || SchemeIs(url::kWssScheme) ||
         (SchemeIsFileSystem() && inner_url() && inner_url()->SchemeIsSecure());
   }
 
   // The "content" of the URL is everything after the scheme (skipping the
   // scheme delimiting colon). It is an error to get the origin of an invalid
@@ skipping 157 matching lines @@
   // Used for nested schemes [currently only filesystem:].
   scoped_ptr<GURL> inner_url_;
 
   // TODO bug 684583: Add encoding for query params.
 };
 
 // Stream operator so GURL can be used in assertion statements.
 URL_EXPORT std::ostream& operator<<(std::ostream& out, const GURL& url);
 
 #endif  // URL_GURL_H_