Allow SVG images to not taint the canvas with drawImage/drawPattern

Source/core/rendering/svg/RenderSVGRoot.cpp

Index: Source/core/rendering/svg/RenderSVGRoot.cpp
diff --git a/Source/core/rendering/svg/RenderSVGRoot.cpp b/Source/core/rendering/svg/RenderSVGRoot.cpp
index 47c86deaeba8572b234d5f57f70299056a4f39b7..c6cb3c6447d0d1b50d7fe5f95319acfa05030ec2 100644
--- a/Source/core/rendering/svg/RenderSVGRoot.cpp
+++ b/Source/core/rendering/svg/RenderSVGRoot.cpp
@@ -40,6 +40,7 @@
 #include "core/rendering/svg/SVGResourcesCache.h"
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGSVGElement.h"
+#include "core/svg/graphics/SVGImage.h"
 
 using namespace std;
 
@@ -110,13 +111,7 @@ void RenderSVGRoot::computeIntrinsicRatioInformation(FloatSize& intrinsicSize, d
 
 bool RenderSVGRoot::isEmbeddedThroughSVGImage() const
 {
-    if (!node())
-        return false;
-
-    // Test whether we're embedded through an img.
-    if (Page* page = node()->document()->page())
-        return page->chrome().client().isSVGImageChromeClient();
-    return false;
+    return SVGImage::isInSVGImage(toSVGSVGElement(node()));
 }
 
 bool RenderSVGRoot::isEmbeddedThroughFrameContainingSVGDocument() const