Update CM API IDL to use SecureContext

content/public/common/content_features.cc

Index: content/public/common/content_features.cc
diff --git a/content/public/common/content_features.cc b/content/public/common/content_features.cc
index a35805dcfd95b1eaba8f33b554bf2756e1983728..2bd44e0a335b35f7fd5ed347cdcca26a92390d87 100644
--- a/content/public/common/content_features.cc
+++ b/content/public/common/content_features.cc
@@ -57,11 +57,6 @@ const base::Feature kCompositeOpaqueFixedPosition{
 const base::Feature kCompositeOpaqueScrollers{"CompositeOpaqueScrollers",
                                               base::FEATURE_ENABLED_BY_DEFAULT};
 
-// Enables the credential management API:
-// https://w3c.github.io/webappsec-credential-management/
-const base::Feature kCredentialManagementAPI{"CredentialManagementAPI",
-                                             base::FEATURE_ENABLED_BY_DEFAULT};
-
 // Speculatively pre-evaluate Javascript which will likely use document.write to
 // load an external script. The feature extracts the written markup and sends it
 // to the preload scanner.