Deprecate all -internal-media-controls-* currently expose to web contents.

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 f826cc0ba2464b7168c0d4c55a6e34987e60ea21..f0bbf76ba7c16a6b5b221d2332cd7c9f08b67d15 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -394,6 +394,24 @@ String Deprecation::deprecationMessage(UseCounter::Feature feature) {
           "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:
+      return willBeRemoved(
+          "-internal-media-controls-text-track-list* selectors", M59,
+          "5661431349379072");
+
     // Features that aren't deprecated don't have a deprecation message.
     default:
       return String();