PaymentRequest: Deprecate careOf attribute in PaymentAddress.

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 07965515e7b6a4c34df7cc4efa683fb63f52bdb3..d14a7253a2df332729a62f1175638448d8ae98f7 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -386,6 +386,11 @@ String Deprecation::deprecationMessage(UseCounter::Feature feature)
     case UseCounter::ScriptInvalidTypeOrLanguage:
         return willBeRemoved("Fetching scripts with an invalid type/language attributes", M56, "5760718284521472");
 
+    // The PaymentAddress.careOf was deprecated and then will be removed in M56.
+    // Please see: https://www.chromestatus.com/features/5728579069411328
+    case UseCounter::PaymentAddressCareOf:
+        return willBeRemoved("PaymentAddress.careOf", M56, "5728579069411328");
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
         return String();