getPageSource doesn't get the full page when it is large

Originally reported on Google Code with ID 5011

```
When a page that is large, the method getPageSource() doesn't get the whole page, but
only part of it. When the page source exceeds the limited size, it shows (...) at the
end of the content.

The steps are:
driver.get("<the url that has a lot of information>");
driver.getPageSource();
```

Reported by `henry.monma` on 2013-01-14 19:20:10
