Add a requestFullscreen variant with a default (prefixed) type

third_party/WebKit/Source/core/dom/ElementFullscreen.cpp

Index: third_party/WebKit/Source/core/dom/ElementFullscreen.cpp
diff --git a/third_party/WebKit/Source/core/dom/ElementFullscreen.cpp b/third_party/WebKit/Source/core/dom/ElementFullscreen.cpp
index f83acfeb59e9339bf80c5e5dbb06516bfb545916..56d207c64469e39052250120e571ba84cfdf1a15 100644
--- a/third_party/WebKit/Source/core/dom/ElementFullscreen.cpp
+++ b/third_party/WebKit/Source/core/dom/ElementFullscreen.cpp
@@ -10,14 +10,14 @@
 namespace blink {
 
 void ElementFullscreen::requestFullscreen(Element& element) {
-  Fullscreen::requestFullscreen(element, Fullscreen::UnprefixedRequest);
+  Fullscreen::requestFullscreen(element, Fullscreen::RequestType::Unprefixed);
 }
 
 void ElementFullscreen::webkitRequestFullscreen(Element& element) {
   if (element.isInShadowTree())
     UseCounter::count(element.document(),
                       UseCounter::PrefixedElementRequestFullscreenInShadow);
-  Fullscreen::requestFullscreen(element, Fullscreen::PrefixedRequest);
+  Fullscreen::requestFullscreen(element, Fullscreen::RequestType::Prefixed);
 }
 
 }  // namespace blink