Chromium implementation of discardBackbuffer WebGraphicsContext3D extension.

content/common/gpu/texture_image_transport_surface.cc

Index: content/common/gpu/texture_image_transport_surface.cc
diff --git a/content/common/gpu/texture_image_transport_surface.cc b/content/common/gpu/texture_image_transport_surface.cc
index a22f6bb6851cc2f17af9f6f4d7229ad9060e7ccf..d7ddd481c5d8d4d88502912eb4dc9a384476e0bd 100644
--- a/content/common/gpu/texture_image_transport_surface.cc
+++ b/content/common/gpu/texture_image_transport_surface.cc
@@ -157,9 +157,7 @@ void TextureImageTransportSurface::SetBufferAllocation(
       break;
     case BUFFER_ALLOCATION_FRONT_ONLY:
     case BUFFER_ALLOCATION_NONE:
-      // TODO(piman): Re-enable this (or something else) when we fix the
-      // renderer so it doesn't try to draw/swap on deleted back buffers.
-      // ReleaseBackTexture();
+      ReleaseBackTexture();
       break;
   };
 }