Remove dynamic MediaControlCastButtonElement::shadowPseudoId.

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

Index: third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
diff --git a/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp b/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
index 778de8c35b26e1d3b9a18b4cebafb1de41965db5..56f2ac372f8d6d4c522ac91ddad70933705e95f9 100644
--- a/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
+++ b/third_party/WebKit/Source/core/html/shadow/MediaControlElements.cpp
@@ -991,6 +991,9 @@ MediaControlCastButtonElement* MediaControlCastButtonElement::create(
   MediaControlCastButtonElement* button =
       new MediaControlCastButtonElement(mediaControls, isOverlayButton);
   button->ensureUserAgentShadowRoot();
+  button->setShadowPseudoId(isOverlayButton
+                                ? "-internal-media-controls-overlay-cast-button"
+                                : "-internal-media-controls-cast-button");
   button->setType(InputTypeNames::button);
   return button;
 }
@@ -1017,14 +1020,6 @@ void MediaControlCastButtonElement::defaultEventHandler(Event* event) {
   MediaControlInputElement::defaultEventHandler(event);
 }
 
-const AtomicString& MediaControlCastButtonElement::shadowPseudoId() const {
-  DEFINE_STATIC_LOCAL(AtomicString, id_nonOverlay,
-                      ("-internal-media-controls-cast-button"));
-  DEFINE_STATIC_LOCAL(AtomicString, id_overlay,
-                      ("-internal-media-controls-overlay-cast-button"));
-  return m_isOverlayButton ? id_overlay : id_nonOverlay;
-}
-
 void MediaControlCastButtonElement::setIsPlayingRemotely(
     bool isPlayingRemotely) {
   if (isPlayingRemotely) {