Close the media controls overflow menu when an item is selected.

third_party/WebKit/Source/core/html/shadow/MediaControls.cpp

Index: third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp b/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
index d3fea6a483f2ce6428ae99c00a1d1b85c09081cd..a51eb6f9e8779a91d3ae3225550a0e0d48ba99e1 100644
--- a/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControls.cpp
@@ -844,11 +844,12 @@ void MediaControls::networkStateChanged()
 
 bool MediaControls::overflowMenuVisible()
 {
-    return m_overflowList->isWanted();
+    return m_overflowList ? m_overflowList->isWanted() : false;
 }
 
 void MediaControls::toggleOverflowMenu()
 {
+    DCHECK(m_overflowList);
     m_overflowList->setIsWanted(!m_overflowList->isWanted());
 }