Skip canvas filter construction in frameless documents

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DState.cpp

Index: third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DState.cpp
diff --git a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DState.cpp b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DState.cpp
index c76cff5f2062e30bd3d4386f974e194517d64586..aba170e1339a576a40ab75bcfb88c9201fa7acbd 100644
--- a/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DState.cpp
+++ b/third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2DState.cpp
@@ -293,6 +293,10 @@ SkImageFilter* CanvasRenderingContext2DState::getFilter(Element* styleResolution
     if (!m_filterValue)
         return nullptr;
 
+    // StyleResolverState cannot be used in frame-less documents.
+    if (!styleResolutionHost->document().frame())
+        return nullptr;
+
     if (!m_resolvedFilter) {
         RefPtr<ComputedStyle> filterStyle = ComputedStyle::create();
         // Must set font in case the filter uses any font-relative units (em, ex)