Remove SchemeRegistry::RegisterURLSchemeAsCORSEnabled

It's not used in chromium, and we need to remove it because we are
moving CORS logic to the network service.

Bug: 800669
Change-Id: I78d4b9ed641d3dca54ad80954872082e2450d2ef
Reviewed-on: https://chromium-review.googlesource.com/1157364
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Takashi Toyoshima <toyoshim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580838}

third_party/blink/renderer/platform/weborigin/scheme_registry.cc

@@ -224,11 +224,6 @@ bool SchemeRegistry::ShouldTreatURLSchemeAsNotAllowingJavascriptURLs(
       scheme);
 }
 
-void SchemeRegistry::RegisterURLSchemeAsCORSEnabled(const String& scheme) {
-  DCHECK_EQ(scheme, scheme.LowerASCII());
-  GetMutableURLSchemesRegistry().cors_enabled_schemes.insert(scheme);
-}
-
 bool SchemeRegistry::ShouldTreatURLSchemeAsCORSEnabled(const String& scheme) {
   DCHECK_EQ(scheme, scheme.LowerASCII());
   if (scheme.IsEmpty())

third_party/blink/renderer/platform/weborigin/scheme_registry.h

@@ -87,12 +87,6 @@ class PLATFORM_EXPORT SchemeRegistry {
   static bool ShouldTreatURLSchemeAsNotAllowingJavascriptURLs(
       const String& scheme);
 
-  // Allow non-HTTP schemes to be registered to allow CORS requests.
-  // This is not used in Chromium anymore but left here intentionally
-  // to allow other embedders of Blink to add more schemes
-  // to the CORS-enabled schemes list.
-  // As for now (Nov 2017) it is used by Electron.
-  static void RegisterURLSchemeAsCORSEnabled(const String& scheme);
   static bool ShouldTreatURLSchemeAsCORSEnabled(const String& scheme);
 
   // Serialize the registered schemes in a comma-separated list.