Remove -internals-media-controls-cast-button as web exposed CSS selector.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/Deprecation.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 371 matching lines @@
     case UseCounter::VRDeprecatedGetPose:
       return replacedBy("VRDisplay.getPose()", "VRDisplay.getFrameData()");
 
     case UseCounter::
         ServiceWorkerRespondToNavigationRequestWithRedirectedResponse:
       return String::format(
           "The service worker responded to the navigation request with a "
           "redirected response. This will result in an error in %s.",
           milestoneString(M59));
 
-    case UseCounter::CSSSelectorInternalMediaControlsCastButton:
-      return willBeRemoved("-internal-media-controls-cast-button selector", M59,
-                           "5734009183141888");
-
     case UseCounter::CSSSelectorInternalMediaControlsOverlayCastButton:
       return willBeRemoved(
           "-internal-media-controls-overlay-cast-button selector", M59,
           "5714245488476160");
 
     case UseCounter::CSSSelectorInternalMediaControlsTextTrackList:
     case UseCounter::CSSSelectorInternalMediaControlsTextTrackListItem:
     case UseCounter::CSSSelectorInternalMediaControlsTextTrackListItemInput:
     case UseCounter::CSSSelectorInternalMediaControlsTextTrackListKindCaptions:
     case UseCounter::CSSSelectorInternalMediaControlsTextTrackListKindSubtitles:
@@ skipping 36 matching lines @@
       return willBeRemoved("indexedDB.webkitGetDatabaseNames()", M60,
                            "5725741740195840");
 
     // Features that aren't deprecated don't have a deprecation message.
     default:
       return String();
   }
 }
 
 }  // namespace blink