Use newImageSnapshot() to get an image from a Canvas

Source/platform/graphics/ImageBufferSurface.cpp

Index: Source/platform/graphics/ImageBufferSurface.cpp
diff --git a/Source/platform/graphics/ImageBufferSurface.cpp b/Source/platform/graphics/ImageBufferSurface.cpp
index 48e4b9734c3a3d7e4621b03b44e4fb4217be626d..038814f54a4b3e95155d4dcc69e7232acb6c3d10 100644
--- a/Source/platform/graphics/ImageBufferSurface.cpp
+++ b/Source/platform/graphics/ImageBufferSurface.cpp
@@ -35,6 +35,7 @@
 #include "platform/graphics/ImageBuffer.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkDevice.h"
+#include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkPicture.h"
 
 namespace blink {
@@ -46,6 +47,8 @@ ImageBufferSurface::ImageBufferSurface(const IntSize& size, OpacityMode opacityM
     setIsHidden(false);
 }
 
+ImageBufferSurface::~ImageBufferSurface() { }
+
 PassRefPtr<SkPicture> ImageBufferSurface::getPicture()
 {
     return nullptr;
@@ -78,4 +81,9 @@ const SkBitmap& ImageBufferSurface::cachedBitmap() const
     return nullBitmap;
 }
 
+PassRefPtr<SkImage> ImageBufferSurface::newImageSnapshot() const
+{
+    return nullptr;
+}
+
 } // namespace blink