Fixes for support for multisampled Linux/GLX GLContexts

gfx/thebes/GLContextProviderGLX.cpp

@@ -1238,7 +1238,7 @@ GLContextProviderGLX::CreateOffscreen(const gfxIntSize& aSize,
                                       const ContextFormat& aFormat)
 {
     ContextFormat actualFormat(aFormat);
-    actualFormat.samples = 0;
+    // actualFormat.samples = 0;
 
     nsRefPtr<GLContextGLX> glContext =
         CreateOffscreenPixmapContext(aSize, actualFormat, true);
@@ -1253,7 +1253,7 @@ GLContextProviderGLX::CreateOffscreen(const gfxIntSize& aSize,
         return nsnull;
     }
 
-    if (!glContext->ResizeOffscreenFBO(aSize)) {
+    if (!glContext->ResizeOffscreenFBO(aSize, true)) {
         // we weren't able to create the initial
         // offscreen FBO, so this is dead
         return nsnull;