Eliminate usage of content url constants in Autofill core code.

components/autofill/core/browser/autofill_manager.cc

Index: components/autofill/core/browser/autofill_manager.cc
diff --git a/components/autofill/core/browser/autofill_manager.cc b/components/autofill/core/browser/autofill_manager.cc
index 4b2afb1590ceea5d4d34c5956d21d2da6fc36b06..def1a100ad05b142ca676bf671b586d6e1601aae 100644
--- a/components/autofill/core/browser/autofill_manager.cc
+++ b/components/autofill/core/browser/autofill_manager.cc
@@ -47,7 +47,6 @@
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/common/url_constants.h"
 #include "grit/component_strings.h"
 #include "third_party/WebKit/public/web/WebAutofillClient.h"
 #include "ui/base/l10n/l10n_util.h"
@@ -126,7 +125,9 @@ bool SectionIsAutofilled(const FormStructure& form_structure,
 }
 
 bool FormIsHTTPS(const FormStructure& form) {
-  return form.source_url().SchemeIs(content::kHttpsScheme);
+  // TODO(blundell): Change this to use a constant once crbug.com/306258 is
+  // fixed.
+  return form.source_url().SchemeIs("https");
 }
 
 // Uses the existing personal data in |profiles| and |credit_cards| to determine