[Cast] Disable autohide of media controls for remote playback

Source/core/html/shadow/MediaControls.cpp

Index: Source/core/html/shadow/MediaControls.cpp
diff --git a/Source/core/html/shadow/MediaControls.cpp b/Source/core/html/shadow/MediaControls.cpp
index 6e3fef244861bfc448c40722dde83b54e710f037..0ce4e6e0fca708465e7e1203aed7b1382617dcba 100644
--- a/Source/core/html/shadow/MediaControls.cpp
+++ b/Source/core/html/shadow/MediaControls.cpp
@@ -244,7 +244,7 @@ void MediaControls::makeTransparent()
 bool MediaControls::shouldHideMediaControls(unsigned behaviorFlags) const
 {
     // Never hide for a media element without visual representation.
-    if (!mediaElement().hasVideo())
+    if (!mediaElement().hasVideo() || mediaElement().isPlayingRemotely())
         return false;
     // Don't hide if the mouse is over the controls.
     const bool ignoreControlsHover = behaviorFlags & IgnoreControlsHover;