JD_Toims - 10:22 pm on Aug 16, 2013 (gmt 0)
This is interesting because Google isn't (officially) supposed to have the ability to crawl frames and iframes.
I'm not sure about this.
Technically, they have the ability to detect URLs and to <frame> or <iframe> another page there must be a source URL involved and they definitely have the ability to crawl URLs [can't have a search engine without detecting and crawling URLs], so they do [and have for a long time] have the ability to crawl <frame>d and <iframe>d URLs.
There has been a question for a while about what "counts" from <iframe>d sources and the most recent tests I've seen show they are not only spidered but also pass link weight. Source: [seroundtable.com...]