_preprocess_views_view not getting called
Ok. Then, we have to consider the following possibilities:


The name of the function is bad typed. The structure for this case should be template_preprocess_HOOK(&amp;$variables). The second part (_preprocces) and third part (_views_view) is well typed, but are you sure the first part is well typed? I assume that "bootstrap" is the name of your theme.
This template hasn't been called when you visit the page, for example, if the pages have been stored in cache_page table for anonymous users. Another possibility could be that a different template has been called.