Report errors in RTCPeerConnection legacy functions via the the failure callback instead of excepti…

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 65f6557d7f49423e8b70a9ddeb444881b0fbeb22..3aa5084e89d1f3046e77bfc1fc29f97d29a6a127 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -330,12 +330,6 @@ String Deprecation::deprecationMessage(UseCounter::Feature feature)
     case UseCounter::V8TouchEvent_InitTouchEvent_Method:
         return replacedWillBeRemoved("'TouchEvent.initTouchEvent'", "the TouchEvent constructor", 53, "5730982598541312");
 
-    case UseCounter::RTCPeerConnectionCreateAnswerLegacyNoFailureCallback:
-        return "RTCPeerConnection.CreateAnswer without a failure callback is deprecated. The failure callback will be a required parameter in M50. See https://www.chromestatus.com/feature/5663288008376320 for more details";
-
-    case UseCounter::RTCPeerConnectionCreateOfferLegacyNoFailureCallback:
-        return "RTCPeerConnection.CreateOffer without a failure callback is deprecated. The failure callback will be a required parameter in M50. See https://www.chromestatus.com/feature/5663288008376320 for more details";
-
     case UseCounter::ObjectObserve:
         return willBeRemoved("'Object.observe'", 50, "6147094632988672");