Add null check in createTransparentImage

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index 655442579b0afbc4d611446376ec62f42f9455c4..7a085d9c01ca834cd0978d65a6417832f05f26a7 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -115,7 +115,8 @@ PassRefPtr<Image> createTransparentImage(const IntSize& size) {
   DCHECK(ImageBuffer::canCreateImageBuffer(size));
   sk_sp<SkSurface> surface =
       SkSurface::MakeRasterN32Premul(size.width(), size.height());
-  return StaticBitmapImage::create(surface->makeImageSnapshot());
+  return surface ? StaticBitmapImage::create(surface->makeImageSnapshot())
+                 : nullptr;
 }
 
 }  // namespace