* avm2: Use RawTable to implement 'public index' iteration
This makes our implementation more closely aligned with avmplus.
In particular, it's now possible to delete keys from an object
while iterating without disturbing the iteration order (as long
as those keys were already produced by the iterator).
This is based on @Bale001's work on RawTable-based iteration
A few tests had their output changed (they depend on the exact
object iteration order, and don't neccessarily match Flash Player
exactly).
* Use Cell to store index fields
* Remove outdated comment
This relieves some headaches with on connect callback and spawning of the
sending async task, since some SWFs like to send data before the connect event
is called.
Both of these are handled automatically by the browser in the
web backend. This makes the desktop client store cookies between
requests (though they are discarded when the desktop player is closed),
and set the "Content-Type" header based on the mime-type supplied
in the URLRequest.
Since wgpu hasn't yet released a version with this feature, I manually
backported it to the 0.17 branch.
This doesn't work on Windows (HLSL), but works on all other platforms.
Some experimentation with Pixel Bender Studio shows
that Opcode::Loop has a 23-byte payload. I haven't tried to
figure out how to interpet the payload yet, but we can now
skip over the opcode instead of bailing out entirely.
The 'gc_arena' dependency was only used to manipulate the `GcCell`s
containing the vertex and fragment shaders; replacing these by a
reference to a plain old `Cell` means tha the Context3D traits and
types do not need to interact with GC'd object anymore.
As a knock-on effect, we can also remove the `Activation` parameter
from most of the `Context3DObject` methods.