Revert of Remove WebSettings::setDisallowFullscreenForNonMediaElements(bool)

Source/web/FullscreenController.cpp

Index: Source/web/FullscreenController.cpp
diff --git a/Source/web/FullscreenController.cpp b/Source/web/FullscreenController.cpp
index 6c1aa5fe4a9e3dca85325a4b3473fe0b7566513e..7c1215b456474c64686c156ff96f8bda3500f028 100644
--- a/Source/web/FullscreenController.cpp
+++ b/Source/web/FullscreenController.cpp
@@ -155,6 +155,9 @@
 
 void FullscreenController::enterFullScreenForElement(blink::Element* element)
 {
+    if (m_webViewImpl->settingsImpl()->disallowFullscreenForNonMediaElements() && !isHTMLMediaElement(element))
+        return;
+
     // We are already transitioning to fullscreen for a different element.
     if (m_provisionalFullScreenElement) {
         m_provisionalFullScreenElement = element;