Added a new runtime setting for RequireUserGestureForFullscreenRestriction.

Source/web/WebSettingsImpl.cpp

Index: Source/web/WebSettingsImpl.cpp
diff --git a/Source/web/WebSettingsImpl.cpp b/Source/web/WebSettingsImpl.cpp
index 4d77ebd16044aa02627318ad767366358bd690f2..0ecdb5e4617c8d22cd8aaa66ca3c49518d84e68b 100644
--- a/Source/web/WebSettingsImpl.cpp
+++ b/Source/web/WebSettingsImpl.cpp
@@ -655,6 +655,11 @@ void WebSettingsImpl::setMediaPlaybackRequiresUserGesture(bool required)
     m_settings->setMediaPlaybackRequiresUserGesture(required);
 }
 
+void WebSettingsImpl::setMediaFullscreenRequiresUserGesture(bool required)
+{
+    m_settings->setMediaFullscreenRequiresUserGesture(required);
+}
+
 void WebSettingsImpl::setFixedPositionCreatesStackingContext(bool creates)
 {
     m_settings->setFixedPositionCreatesStackingContext(creates);