An interesting question was asked in the last Google hangout with John Mueller at the 21:16 mark into the video. The question was around controlling or influencing Google to index the page of content that is embedding the iframe over the source of that content.

The question was:

John Mueller said the short answer is that you cannot do that. He said “so the short version is you can’t.” He then explained you can use a rel canonical to kind of force the redirect, if you own access to the other page. He also said Google will respect the meta tag to you don’t want your pages to be iframed. But again, that is the reverse case of the answer.

Here is the video embed on this topic:

Here is the transcript of the answer:

Forum discussion at YouTube.