Refactor overlay fullscreen video handling into a single callback

third_party/WebKit/Source/web/ChromeClientImpl.cpp

Index: third_party/WebKit/Source/web/ChromeClientImpl.cpp
diff --git a/third_party/WebKit/Source/web/ChromeClientImpl.cpp b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
index 0f7c13ce31c6d9ec55bb9c349e962872f7c94247..373e6d342b32af1fb2d2b6b32e373f37f38ccd93 100644
--- a/third_party/WebKit/Source/web/ChromeClientImpl.cpp
+++ b/third_party/WebKit/Source/web/ChromeClientImpl.cpp
@@ -859,6 +859,11 @@ void ChromeClientImpl::exitFullscreen(LocalFrame* frame) {
   m_webView->exitFullscreen(frame);
 }
 
+void ChromeClientImpl::fullscreenElementChanged(Element* fromElement,
+                                                Element* toElement) {
+  m_webView->fullscreenElementChanged(fromElement, toElement);
+}
+
 void ChromeClientImpl::clearCompositedSelection(LocalFrame* frame) {
   LocalFrame* localRoot = frame->localFrameRoot();
   auto client =