Deal gracefully with null {GraphicsContext,SkPictureBuilder}.endRecording() results.

third_party/WebKit/Source/core/svg/graphics/SVGImage.cpp

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 269 matching lines @@
     SkPictureBuilder patternPicture(spacedTile, nullptr, &context);
     if (!DrawingRecorder::useCachedDrawingIfPossible(patternPicture.context(), *this, DisplayItem::Type::SVGImage)) {
         DrawingRecorder patternPictureRecorder(patternPicture.context(), *this, DisplayItem::Type::SVGImage, spacedTile);
         // When generating an expanded tile, make sure we don't draw into the spacing area.
         if (tile != spacedTile)
             patternPicture.context().clip(tile);
         SkPaint paint;
         drawForContainer(patternPicture.context().canvas(), paint, containerSize, zoom, tile, srcRect, url);
     }
     RefPtr<SkPicture> tilePicture = patternPicture.endRecording();
+    if (!tilePicture)
+        return;
 
     SkMatrix patternTransform;
     patternTransform.setTranslate(phase.x() + spacedTile.x(), phase.y() + spacedTile.y());
 
     SkPaint paint;
     paint.setShader(SkShader::MakePictureShader(toSkSp(tilePicture.release()),
         SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, &patternTransform, nullptr));
     paint.setXfermodeMode(compositeOp);
     paint.setColorFilter(context.colorFilter());
     context.drawRect(dstRect, paint);
@@ skipping 63 matching lines @@
         ASSERT(!view->needsLayout());
     }
 
     {
         SkAutoCanvasRestore ar(canvas, false);
         if (drawNeedsLayer(paint)) {
             SkRect layerRect = dstRect;
             canvas->saveLayer(&layerRect, &paint);
         }
         RefPtr<const SkPicture> recording = imagePicture.endRecording();
-        canvas->drawPicture(recording.get());
+        if (recording)
+            canvas->drawPicture(recording.get());
     }
 
     if (getImageObserver())
         getImageObserver()->didDraw(this);
 
     // Start any (SMIL) animations if needed. This will restart or continue
     // animations if preceded by calls to resetAnimation or stopAnimation
     // respectively.
     startAnimation();
 }
@@ skipping 152 matching lines @@
 
     return m_page;
 }
 
 String SVGImage::filenameExtension() const
 {
     return "svg";
 }
 
 } // namespace blink