Rename NoEventDispatchAssertion to EventDispatchForbiddenScope and move it to platform/

Source/core/svg/graphics/SVGImage.cpp

Index: Source/core/svg/graphics/SVGImage.cpp
diff --git a/Source/core/svg/graphics/SVGImage.cpp b/Source/core/svg/graphics/SVGImage.cpp
index fdf5bc94a3a054c18b54701c0b4cfbba73a3e76a..b8484da28a84caa9f3b2699bad15266bc326af8d 100644
--- a/Source/core/svg/graphics/SVGImage.cpp
+++ b/Source/core/svg/graphics/SVGImage.cpp
@@ -30,7 +30,6 @@
 #include "core/svg/graphics/SVGImage.h"
 
 #include "core/animation/AnimationTimeline.h"
-#include "core/dom/NoEventDispatchAssertion.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/shadow/ComposedTreeWalker.h"
 #include "core/frame/FrameView.h"
@@ -46,6 +45,7 @@
 #include "core/svg/SVGSVGElement.h"
 #include "core/svg/animation/SMILTimeContainer.h"
 #include "core/svg/graphics/SVGImageChromeClient.h"
+#include "platform/EventDispatchForbiddenScope.h"
 #include "platform/LengthFunctions.h"
 #include "platform/TraceEvent.h"
 #include "platform/geometry/IntRect.h"
@@ -386,7 +386,7 @@ bool SVGImage::dataChanged(bool allDataReceived)
         // actually allow script to run so it's fine to call into it. We allow this
         // since it means an SVG data url can synchronously load like other image
         // types.
-        NoEventDispatchAssertion::AllowUserAgentEvents allowUserAgentEvents;
+        EventDispatchForbiddenScope::AllowUserAgentEvents allowUserAgentEvents;
 
         static FrameLoaderClient* dummyFrameLoaderClient = new EmptyFrameLoaderClient;