Simplify MediaControls::show() and hide()

Source/core/html/shadow/MediaControlElements.cpp

Index: Source/core/html/shadow/MediaControlElements.cpp
diff --git a/Source/core/html/shadow/MediaControlElements.cpp b/Source/core/html/shadow/MediaControlElements.cpp
index 5e0437684f1e317363d5768406afd98078b9227b..afbdf8ef182d285294941be228a53c294bfde5d5 100644
--- a/Source/core/html/shadow/MediaControlElements.cpp
+++ b/Source/core/html/shadow/MediaControlElements.cpp
@@ -63,7 +63,6 @@ MediaControlPanelElement::MediaControlPanelElement(MediaControls& mediaControls)
     : MediaControlDivElement(mediaControls, MediaControlsPanel)
     , m_canBeDragged(false)
     , m_isBeingDragged(false)
-    , m_isDisplayed(false)
     , m_opaque(true)
     , m_transitionTimer(this, &MediaControlPanelElement::transitionTimerFired)
 {
@@ -192,9 +191,7 @@ void MediaControlPanelElement::makeOpaque()
     setInlineStyleProperty(CSSPropertyOpacity, 1.0, CSSPrimitiveValue::CSS_NUMBER);
 
     m_opaque = true;
-
-    if (m_isDisplayed)
-        show();
+    show();
 }
 
 void MediaControlPanelElement::makeTransparent()
@@ -240,11 +237,6 @@ void MediaControlPanelElement::setCanBeDragged(bool canBeDragged)
         endDrag();
 }
 
-void MediaControlPanelElement::setIsDisplayed(bool isDisplayed)
-{
-    m_isDisplayed = isDisplayed;
-}
-
 // ----------------------------
 
 MediaControlPanelEnclosureElement::MediaControlPanelEnclosureElement(MediaControls& mediaControls)