Backed out changeset 58d155b0b54a (bug 1624768) for mochitest failures at test_2_conformance2__renderbuffers__multisampled-depth-renderbuffer-initialization.html.

dom/canvas/ClientWebGLContext.cpp

@@ -3181,14 +3181,6 @@ void ClientWebGLContext::RenderbufferStorageMultisample(GLenum target,
     return;
   }
 
-  if (internalFormat == LOCAL_GL_DEPTH_STENCIL && samples > 0) {
-    // While our backend supports it trivially, the spec forbids it.
-    EnqueueError(LOCAL_GL_INVALID_OPERATION,
-                 "WebGL 1's DEPTH_STENCIL format may not be multisampled. Use "
-                 "DEPTH24_STENCIL8 when `samples > 0`.");
-    return;
-  }
-
   Run<RPROC(RenderbufferStorageMultisample)>(
       rb->mId, static_cast<uint32_t>(samples), internalFormat,
       static_cast<uint32_t>(width), static_cast<uint32_t>(height));