diff -r 1ce0536aed19 gfx/2d/DrawTargetSkia.cpp
--- a/gfx/2d/DrawTargetSkia.cpp	Sat Oct 20 19:08:48 2018 +0000
+++ b/gfx/2d/DrawTargetSkia.cpp	Fri Oct 26 23:44:29 2018 +0000
@@ -200,6 +200,7 @@
   const int pixelSize = 4;
   MOZ_ASSERT(aSize.width * pixelSize <= aStride);
 
+  return true;
   const int translation = bounds.Y() * aStride + bounds.X() * pixelSize;
   const int topLeft = translation;
   const int topRight = topLeft + (width - 1) * pixelSize;
diff -r 1ce0536aed19 gfx/2d/HelpersCairo.h
--- a/gfx/2d/HelpersCairo.h	Sat Oct 20 19:08:48 2018 +0000
+++ b/gfx/2d/HelpersCairo.h	Fri Oct 26 23:44:29 2018 +0000
@@ -161,7 +161,7 @@
     case SurfaceFormat::R5G6B5_UINT16:
       return CAIRO_FORMAT_RGB16_565;
     default:
-      gfxCriticalError() << "Unknown image format " << (int)format;
+      //gfxCriticalError() << "Unknown image format " << (int)format;
       return CAIRO_FORMAT_ARGB32;
   }
 }