Remove the default product entity from the form state just prior to caching

Hi guys,

Similar to the issue #2057073: Cache form table saves very large records when forms are displayed in a view, which works great for Product Display nodes used in Views, there is a similar issue when using a Commerce Product cart form in a View in which the entire product and its context (as well as additional fields!) are stored in cache_form.

For our use case I have created a View that displays all of a product's variations, based on a node ID. This is helpful for our customers who are given multiple options for purchase, such as in the below screenshot:

This works by using the Context (NID) and displaying all referenced products in a table. It's pretty low tech. Note the important part: it uses the actual Products, and the Commerce Product "Add to Cart Form" field.

It seems that, while a Product Display node's "Add to Cart" button is not cached when used in views, this is not true when using a Product Entity's "Add to Cart form". This is evident when, in our Devel statistics block, I see this:

INSERT INTO cache_form (cid, serialized, created, expire, data) VALUES ('form_state_form-ZN8qSl8KlARqduCvOYmArjTNseDBRnZD7knEb4pMsXk', '1', '1409768941', '1409790541', 'a:10:{s:10:\"build_info\";a:3:{s:4:\"args\";a:3:{i:0;O:8:\"stdClass\":12:{s:4:\"type\";s:7:\"product\";s:8:\"order_id\";i:0;s:8:\"quantity\";s:1:\"1\";s:4:\"data\";a:1:{s:7:\"context\";a:3:{s:11:\"product_ids\";a:1:{i:0;s:5:\"12991\";}s:19:\"add_to_cart_combine\";b:0;s:4:\"view\";a:4:{s:9:\"view_name\";s:18:\"product_attributes\";s:12:\"display_name\";s:5:\"block\";s:10:\"human_name\";s:39:\"Product types - Available formats block\";s:4:\"page\";N;}}}s:12:\"line_item_id\";N;s:15:\"line_item_label\";s:18:\"Short-ThisIsHormel\";s:7:\"created\";s:0:\"\";s:7:\"changed\";s:0:\"\";s:6:\"is_new\";b:1;s:16:\"commerce_product\";a:1:{s:3:\"und\";a:1:{i:0;a:1:{s:10:\"product_id\";s:5:\"12991\";}}}s:21:\"commerce_display_path\";a:1:{s:3:\"und\";a:1:{i:0;a:1:{s:5:\"value\";s:0:\"\";}}}s:19:\"commerce_unit_price\";a:1:{s:3:\"und\";a:1:{i:0;a:4:{s:6:\"amount\";s:3:\"199\";s:13:\"currency_code\";s:3:\"USD\";s:4:\"data\";a:1:{s:10:\"components\";a:1:{i:0;a:3:{s:4:\"name\";s:10:\"base_price\";s:5:\"price\";a:3:{s:6:\"amount\";s:3:\"199\";s:13:\"currency_code\";s:3:\"USD\";s:4:\"data\";a:1:{s:10:\"components\";a:0:{}}}s:8:\"included\";b:1;}}}s:8:\"original\";a:3:{s:6:\"amount\";s:3:\"199\";s:13:\"currency_code\";s:3:\"USD\";s:4:\"data\";a:1:{s:10:\"components\";a:0:{}}}}}}}i:1;i:0;i:2;a:0:{}}s:7:\"form_id\";s:36:\"commerce_cart_add_to_cart_form_12991\";s:12:\"base_form_id\";s:30:\"commerce_cart_add_to_cart_form\";}s:10:\"programmed\";b:0;s:30:\"programmed_bypass_access_check\";b:1;s:5:\"cache\";b:1;s:7:\"context\";a:0:{}s:9:\"line_item\";r:4;s:15:\"default_product\";O:8:\"stdClass\":26:{s:11:\"revision_id\";s:5:\"12906\";s:3:\"sku\";s:18:\"Short-ThisIsHormel\";s:5:\"title\";s:14:\"This 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Hormel\";s:12:\"revision_uid\";s:1:\"1\";s:6:\"status\";s:1:\"1\";s:3:\"log\";s:0:\"\";s:18:\"revision_timestamp\";s:10:\"1393613853\";s:4:\"data\";b:0;s:10:\"product_id\";s:5:\"12991\";s:4:\"type\";s:5:\"video\";s:8:\"language\";s:3:\"und\";s:3:\"uid\";s:1:\"1\";s:7:\"created\";s:10:\"1393613853\";s:7:\"changed\";s:10:\"1394497396\";s:14:\"commerce_price\";a:1:{s:3:\"und\";a:1:{i:0;a:4:{s:6:\"amount\";s:3:\"199\";s:13:\"currency_code\";s:3:\"USD\";s:4:\"data\";a:1:{s:10:\"components\";a:1:{i:0;a:3:{s:4:\"name\";s:10:\"base_price\";s:5:\"price\";a:3:{s:6:\"amount\";s:3:\"199\";s:13:\"currency_code\";s:3:\"USD\";s:4:\"data\";a:1:{s:10:\"components\";a:0:{}}}s:8:\"included\";b:1;}}}s:8:\"original\";a:3:{s:6:\"amount\";s:3:\"199\";s:13:\"currency_code\";s:3:\"USD\";s:4:\"data\";a:1:{s:10:\"components\";a:0:{}}}}}}s:16:\"field_legacy_nid\";a:1:{s:3:\"und\";a:1:{i:0;a:3:{s:5:\"value\";s:7:\"3325286\";s:6:\"format\";N;s:10:\"safe_value\";s:7:\"3325286\";}}}s:12:\"field_poster\";a:1:{s:3:\"und\";a:1:{i:0;a:13:{s:3:\"fid\";s:6:\"123876\";s:3:\"uid\";s:1:\"1\";s:8:\"filename\";s:22:\"ThisIsHormelPoster.jpg\";s:3:\"uri\";s:45:\"public://posters/video/ThisIsHormelPoster.jpg\";s:8:\"filemime\";s:10:\"image/jpeg\";s:8:\"filesize\";s:5:\"67972\";s:6:\"status\";s:1:\"1\";s:9:\"timestamp\";s:10:\"1403314940\";s:11:\"rdf_mapping\";a:0:{}s:3:\"alt\";s:0:\"\";s:5:\"title\";s:0:\"\";s:5:\"width\";s:3:\"450\";s:6:\"height\";s:3:\"600\";}}}s:19:\"field_vidly_feature\";a:1:{s:3:\"und\";a:1:{i:0;a:3:{s:5:\"value\";s:6:\"3g2g5d\";s:6:\"format\";N;s:10:\"safe_value\";s:6:\"3g2g5d\";}}}s:21:\"commerce_license_type\";a:1:{s:3:\"und\";a:1:{i:0;a:1:{s:5:\"value\";s:4:\"file\";}}}s:25:\"commerce_license_duration\";a:1:{s:3:\"und\";a:1:{i:0;a:1:{s:5:\"value\";s:1:\"0\";}}}s:13:\"commerce_file\";a:1:{s:3:\"und\";a:4:{i:0;a:11:{s:3:\"fid\";s:5:\"37861\";s:3:\"uid\";s:1:\"1\";s:8:\"filename\";s:23:\"ThisIsHormel_legacy.mp4\";s:3:\"uri\";s:35:\"s3://shorts/ThisIsHormel_legacy.mp4\";s:8:\"filemime\";s:9:\"video/mp4\";s:8:\"filesize\";s:9:\"127424732\";s:6:\"status\";s:1:\"1\";s:9:\"timestamp\";s:10:\"1403045340\";s:11:\"rdf_mapping\";a:0:{}s:7:\"display\";s:1:\"1\";s:11:\"description\";s:14:\"Legacy 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This Is Hormel is a short in the grand tradition of David and Hazel and Setting Up A Room, where you look at the time remaining on your media player and think “Clearly that has to be a mistake.” But no! It’s a half hour long Hormel infomercial masquerading as an educational short that must be seen to be believed!
... 
(snipped because it's so long, the Issue Form could not handle it.)

Is there any chance the "do not cache entity context" functionality from the related Issue could be ported to the Commerce Product: Add to Cart Form Views handler? I believe it would significantly help our performance.

Thanks!