Added [SecureContext] to the subtle attribute

third_party/WebKit/Source/core/frame/Deprecation.cpp

Index: third_party/WebKit/Source/core/frame/Deprecation.cpp
diff --git a/third_party/WebKit/Source/core/frame/Deprecation.cpp b/third_party/WebKit/Source/core/frame/Deprecation.cpp
index ee63588929aff4919b268b4f3199f69e09898e43..d0b22e367cb13f7f4efcb38f9c4b004f6340c638 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -386,14 +386,6 @@ String Deprecation::DeprecationMessage(UseCounter::Feature feature) {
              "https://www.chromestatus.com/features/6680566019653632 for more "
              "details.";
 
-    case UseCounter::kSubtleCryptoOnlyStrictSecureContextCheckFailed:
-      return String::Format(
-          "Web Crypto API usage inside secure frames with non-secure ancestors "
-          "is deprecated. The API will no longer be exposed in these contexts "
-          "as of %s. See https://www.chromestatus.com/features/5030265697075200"
-          " for more details.",
-          milestoneString(M59));
-
     case UseCounter::kRtcpMuxPolicyNegotiate:
       return String::Format(
           "The rtcpMuxPolicy option is being considered for "