[Blink, RemotePlayback] Reject the prompt() with OperationError if there's a pending promise for th…

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
index e9f9ba3a2b7fbdbf2ffd4e583e8cf446beea7d72..ad5bca511ef5d3cd7a0edfe224ddb3479282bc11 100644
--- a/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLMediaElement.cpp
@@ -2194,13 +2194,13 @@ void HTMLMediaElement::pauseInternal() {
 }
 
 void HTMLMediaElement::requestRemotePlayback() {
-  DCHECK(m_remoteRoutesAvailable);
-  webMediaPlayer()->requestRemotePlayback();
+  if (webMediaPlayer())
+    webMediaPlayer()->requestRemotePlayback();
 }
 
 void HTMLMediaElement::requestRemotePlaybackControl() {
-  DCHECK(m_remoteRoutesAvailable);
-  webMediaPlayer()->requestRemotePlaybackControl();
+  if (webMediaPlayer())
+    webMediaPlayer()->requestRemotePlaybackControl();
 }
 
 void HTMLMediaElement::closeMediaSource() {