Rework image_cache_task to avoid using `url` as key during the loadin…
…g of an image.
A `url` can be very large, in particular if it is a data: url, so using it as a key for lookups whenever we load a few bytes is not a very good idea. This patch introduces an intermediate `LoadKey` (internally, an u64) that makes hashmap lookups faster. Somewhere along the way, we also get rid of a few calls to `url.clone()`.
<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7894)
<!-- Reviewable:end -->
Update energymon-sys and energymon-default-sys versions
Includes build script updates to support Rust linking to static libs on ARM systems as well as some changes to ODROID Smart Power and RAPL energymon implementations.
<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7993)
<!-- Reviewable:end -->
Support the updated spidermonkey bindings
Still need to finish the rust-mozjs update and make cargo use it, but it's close enough that I don't expect much to change on the servo side.
Some changes here
- bools are properly translated now
- char16_t is handled as u16 now
- JS_GlobalObjectTraceHook isn't mangled now
- JSJitInfo has been adjusted
- A const fn is used to generate bitfields in JSJitInfo
- Manually generating handles now requires calling an unsafe function. It's not actually required, but it's too much of a hassle to generate them manually now due to bindgen++ adding base classes now.
<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7727)
<!-- Reviewable:end -->
It holds a function pointer to the HeapSizeOf::heap_size_of_children()
implementation corresponding to that IDL interface.
This removes the need for a clumsly TypeId-based match expression in the
former heap_size_of_eventtarget() function.
Generate the various TypeId enums in codegen
This frees us forever from caring about maintaining these enums. The last commit removes their use from the initialisation of interface objects derived from Node.
<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/7873)
<!-- Reviewable:end -->
A `url` can be very large, in particular if it is a data: url, so using it as a key for lookups whenever we load a few bytes is not a very good idea. This patch introduces an intermediate `LoadKey` (internally, an u64) that makes hashmap lookups faster. Somewhere along the way, we also get rid of a few calls to `url.clone()`.
