I don't think any movie theater that sell food would permit any out side food because that how the owner of the theater make a living they really don't hardly anything of the picture that is being shown.
This is Pacific Theater Policy: For the comfort and safety of our guests, we do not permit large bags into the building. All bags are subject to search and we reserve the right to refuse admittance. Please note that Pacific Theatres has the absolute discretion to interpret and enforce these policies to ensure safety, comfort and peace of mind. I know this does not mention anything about food but this is what i found on their website.
Thanks! Your answer is awaiting moderation.