Flag to disable SMIL support

Source/core/svg/SVGSVGElement.cpp

Index: Source/core/svg/SVGSVGElement.cpp
diff --git a/Source/core/svg/SVGSVGElement.cpp b/Source/core/svg/SVGSVGElement.cpp
index 8fb720631d075ff2bfd1a2bb75339d4d6d72c7b9..ca3567191cd7d0983a6b5ae45922ccb2fd81fb81 100644
--- a/Source/core/svg/SVGSVGElement.cpp
+++ b/Source/core/svg/SVGSVGElement.cpp
@@ -554,13 +554,15 @@ Node::InsertionNotificationRequest SVGSVGElement::insertedInto(ContainerNode* ro
         if (rootParent->document().isXMLDocument())
             UseCounter::count(document(), UseCounter::SVGSVGElementInXMLDocument);
 
-        document().accessSVGExtensions().addTimeContainer(this);
-
-        // Animations are started at the end of document parsing and after firing the load event,
-        // but if we miss that train (deferred programmatic element insertion for example) we need
-        // to initialize the time container here.
-        if (!document().parsing() && !document().processingLoadEvent() && document().loadEventFinished() && !timeContainer()->isStarted())
-            timeContainer()->begin();
+        if (RuntimeEnabledFeatures::smilEnabled()) {
+            document().accessSVGExtensions().addTimeContainer(this);
+
+            // Animations are started at the end of document parsing and after firing the load event,
+            // but if we miss that train (deferred programmatic element insertion for example) we need
+            // to initialize the time container here.
+            if (!document().parsing() && !document().processingLoadEvent() && document().loadEventFinished() && !timeContainer()->isStarted())
+                timeContainer()->begin();
+        }
     }
     return SVGGraphicsElement::insertedInto(rootParent);
 }
@@ -578,28 +580,33 @@ void SVGSVGElement::removedFrom(ContainerNode* rootParent)
 
 void SVGSVGElement::pauseAnimations()
 {
+    ASSERT(RuntimeEnabledFeatures::smilEnabled());
     if (!m_timeContainer->isPaused())
         m_timeContainer->pause();
 }
 
 void SVGSVGElement::unpauseAnimations()
 {
+    ASSERT(RuntimeEnabledFeatures::smilEnabled());
     if (m_timeContainer->isPaused())
         m_timeContainer->resume();
 }
 
 bool SVGSVGElement::animationsPaused() const
 {
+    ASSERT(RuntimeEnabledFeatures::smilEnabled());
     return m_timeContainer->isPaused();
 }
 
 float SVGSVGElement::getCurrentTime() const
 {
+    ASSERT(RuntimeEnabledFeatures::smilEnabled());
     return narrowPrecisionToFloat(m_timeContainer->elapsed().value());
 }
 
 void SVGSVGElement::setCurrentTime(float seconds)
 {
+    ASSERT(RuntimeEnabledFeatures::smilEnabled());
     ASSERT(std::isfinite(seconds));
     seconds = max(seconds, 0.0f);
     m_timeContainer->setElapsed(seconds);