[RemotePlayback] Keep track of source compatibility and reject prompt() correspondingly

third_party/WebKit/Source/modules/remoteplayback/RemotePlaybackTest.cpp

Index: third_party/WebKit/Source/modules/remoteplayback/RemotePlaybackTest.cpp
diff --git a/third_party/WebKit/Source/modules/remoteplayback/RemotePlaybackTest.cpp b/third_party/WebKit/Source/modules/remoteplayback/RemotePlaybackTest.cpp
index 9f5d4f60d189e20cfb3c84c41fec0e4b0acafb4a..19a40a9322630db368ee54867d8bab941dd60f17 100644
--- a/third_party/WebKit/Source/modules/remoteplayback/RemotePlaybackTest.cpp
+++ b/third_party/WebKit/Source/modules/remoteplayback/RemotePlaybackTest.cpp
@@ -55,10 +55,6 @@ class RemotePlaybackTest : public ::testing::Test {
   void setState(RemotePlayback* remotePlayback, WebRemotePlaybackState state) {
     remotePlayback->stateChanged(state);
   }
-
-  void setAvailability(RemotePlayback* remotePlayback, bool available) {
-    remotePlayback->availabilityChanged(available);
-  }
 };
 
 TEST_F(RemotePlaybackTest, PromptCancelledRejectsWithNotAllowedError) {
@@ -258,7 +254,6 @@ TEST_F(RemotePlaybackTest, DisableRemotePlaybackCancelsAvailabilityCallbacks) {
 
   HTMLMediaElementRemotePlayback::setBooleanAttribute(
       HTMLNames::disableremoteplaybackAttr, *element, true);
-  setAvailability(remotePlayback, true);
 
   // Runs pending promises.
   v8::MicrotasksScope::PerformCheckpoint(scope.isolate());