--- chromium-60.0.3112.101/third_party/angle/src/libANGLE/Framebuffer.cpp.clang	2017-08-14 21:06:39.000000000 +0200
+++ chromium-60.0.3112.101/third_party/angle/src/libANGLE/Framebuffer.cpp	2017-08-26 18:19:05.420000000 +0200
@@ -1100,7 +1100,7 @@
         }
         else
         {
-            return ImageIndex::MakeInvalid();
+            return (const gl::ImageIndex)ImageIndex::MakeInvalid();
         }
     };