Consolidate scheme checks into an easy GURL method

content/browser/download/file_metadata_mac.mm

 // Copyright (c) 2012 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/browser/download/file_metadata_mac.h"
 
 #include <ApplicationServices/ApplicationServices.h>
 #include <Foundation/Foundation.h>
 
 #include "base/files/file_path.h"
@@ skipping 114 matching lines @@
     // We don't want to add any metadata, because that will cause the file to
     // be quarantined against the user's wishes.
     return;
   }
 
   // kLSQuarantineAgentNameKey, kLSQuarantineAgentBundleIdentifierKey, and
   // kLSQuarantineTimeStampKey are set for us (see LSQuarantine.h), so we only
   // need to set the values that the OS can't infer.
 
   if (![quarantine_properties valueForKey:(NSString*)kLSQuarantineTypeKey]) {
-    CFStringRef type = (source.SchemeIs("http") || source.SchemeIs("https"))
+    CFStringRef type = source.SchemeIsHTTPOrHTTPS()
                        ? kLSQuarantineTypeWebDownload
                        : kLSQuarantineTypeOtherDownload;
     [quarantine_properties setValue:(NSString*)type
                              forKey:(NSString*)kLSQuarantineTypeKey];
   }
 
   if (![quarantine_properties
           valueForKey:(NSString*)kLSQuarantineOriginURLKey] &&
       referrer.is_valid()) {
     NSString* referrer_url =
@@ skipping 13 matching lines @@
   OSStatus os_error = LSSetItemAttribute(&file_ref, kLSRolesAll,
                                          kLSItemQuarantineProperties,
                                          quarantine_properties);
   if (os_error != noErr) {
     OSSTATUS_LOG(WARNING, os_error)
         << "Unable to set quarantine attributes on file " << file.value();
   }
 }
 
 }  // namespace content