NOT FOR LANDING Experiment with allocating SVGImageForContainer on demand

Source/core/paint/ImagePainter.cpp

Index: Source/core/paint/ImagePainter.cpp
diff --git a/Source/core/paint/ImagePainter.cpp b/Source/core/paint/ImagePainter.cpp
index b0373f82b4d9cd09feeaae1d5ee050dbcac19dde..41a8cc00c6530098fc48b87a61064931e139aeaf 100644
--- a/Source/core/paint/ImagePainter.cpp
+++ b/Source/core/paint/ImagePainter.cpp
@@ -11,6 +11,7 @@
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLAreaElement.h"
 #include "core/html/HTMLImageElement.h"
+#include "core/html/parser/HTMLParserIdioms.h"
 #include "core/layout/LayoutImage.h"
 #include "core/layout/LayoutReplaced.h"
 #include "core/layout/TextRunConstructor.h"
@@ -18,9 +19,11 @@
 #include "core/paint/BoxPainter.h"
 #include "core/paint/LayoutObjectDrawingRecorder.h"
 #include "core/paint/PaintInfo.h"
+#include "core/svg/graphics/SVGImageForContainer.h"
 #include "platform/geometry/LayoutPoint.h"
 #include "platform/graphics/Path.h"
 #include "platform/graphics/paint/ClipRecorder.h"
+#include "platform/weborigin/KURL.h"
 
 namespace blink {
 
@@ -132,6 +135,19 @@ void ImagePainter::paintIntoRect(GraphicsContext* context, const LayoutRect& rec
     if (!image || image->isNull())
         return;
 
+    if (image->isSVGImage()) {
+        LayoutRect containerRect = m_layoutImage.replacedContentRect();
+        IntSize containerSize(containerRect.width(), containerRect.height());
+        KURL url;
+        Node* node = m_layoutImage.node();
+        if (node && node->isHTMLElement()) {
+            AtomicString urlString = toHTMLElement(node)->imageSourceURL();
+            if (!urlString.isEmpty())
+                url = node->document().completeURL(stripLeadingAndTrailingHTMLSpaces(urlString));
+        }
+        image = SVGImageForContainer::create(toSVGImage(image.get()), containerSize, m_layoutImage.style()->effectiveZoom(), url);
+    }
+
     // FIXME: why is interpolation quality selection not included in the Instrumentation reported cost of drawing an image?
     InterpolationQuality interpolationQuality = BoxPainter::chooseInterpolationQuality(m_layoutImage, context, image.get(), image.get(), LayoutSize(alignedRect.size()));