Only allow subsequence caching for SVG documents, not inline SVG.

third_party/WebKit/Source/core/paint/PaintLayer.cpp

Index: third_party/WebKit/Source/core/paint/PaintLayer.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintLayer.cpp b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
index 334ab82ab3910a692d6d4a4ae3aabc1124a526c2..3c6ca36ef8bf665bf84fc2ce6d74c2fb049ff6de 100644
--- a/third_party/WebKit/Source/core/paint/PaintLayer.cpp
+++ b/third_party/WebKit/Source/core/paint/PaintLayer.cpp
@@ -2784,8 +2784,9 @@ bool PaintLayer::SupportsSubsequenceCaching() const {
   if (EnclosingPaginationLayer())
     return false;
 
-  // SVG paints atomically.
-  if (GetLayoutObject().IsSVGRoot())
+  // SVG documents paint atomically.
+  if (GetLayoutObject().IsSVGRoot() &&
+      GetLayoutObject().GetDocument().IsSVGDocument())
     return true;
 
   // Create subsequence for only stacking contexts whose painting are atomic.