Bug 1058040, part 14 - Have nsImageBoxFrame pass context paint to VectorImage. r=dholbert

layout/xul/nsImageBoxFrame.cpp

@@ -52,6 +52,7 @@
 #include "mozilla/EventDispatcher.h"
 #include "mozilla/Maybe.h"
 #include "SVGImageContext.h"
+#include "Units.h"
 
 #define ONLOAD_CALLED_TOO_EARLY 1
 
@@ -404,13 +405,19 @@ nsImageBoxFrame::PaintImage(nsRenderingContext& aRenderingContext,
                                                 anchorPoint.ptr());
   }
 
+  Maybe<SVGImageContext> svgContext;
+  if (imgCon->GetType() == imgIContainer::TYPE_VECTOR) {
+    // We avoid this overhead for raster images.
+    svgContext.emplace();
+    svgContext->MaybeStoreContextPaint(this);
+  }
 
   return nsLayoutUtils::DrawSingleImage(
            *aRenderingContext.ThebesContext(),
            PresContext(), imgCon,
            nsLayoutUtils::GetSamplingFilterForFrame(this),
            dest, dirty,
-           /* no SVGImageContext */ Nothing(), aFlags,
+           svgContext, aFlags,
            anchorPoint.ptrOr(nullptr),
            hasSubRect ? &mSubRect : nullptr);
 }