Adding nullability support to ImageBitmapRenderingContext.transferImageBitmap

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 bb8273c54fa8abfdd2bc0caabca7139c45e94571..83058a3842678b4a0574ca68b3332c9c9fd2f340 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -257,8 +257,11 @@ bool HTMLCanvasElement::isPaintable() const
 {
     if (!m_context)
         return ImageBuffer::canCreateImageBuffer(size());
-    if (renderingContext()->getImage())
-        return true;
+    if (m_context->getContextType() == CanvasRenderingContext::ContextImageBitmap) {
+        if (renderingContext()->getImage())

[Justin Novosad, 2016/08/24 15:39:16]

Just "return m_context->getImage();" will suffice

[zakerinasab, 2016/08/24 15:57:12]

Used "return renderingContext()->getImage().get();" as PassRefPtr cannot be
converted to bool.

+            return true;
+        return false;
+    }
     return buffer();
 }