Only emit InitializeReplay() after all captured frames have been run,
so that the readBufferSize and the maxClientArraySize are really
sufficiently large for all frames.

To achieve this a layer of indirection is added, that is because
InitializeReplay() has to be called from SetupFrame() which is still
emitted with the first frame, a new function InitReplay() is added.
The call to this  function is emitted with the first frame, buts its
body is emitted after the last frame has been captured.

Bug: angleproject:5965
Change-Id: Ic38791b4c02989594ec87d1ba3f031fd81471314
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2940841Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Cody Northrop <cnorthrop@google.com>