Remove renderTargetContext swapping from GaussianBlur method

Change-Id: Iee3d5165a09b5760e001cade4f9d68e823ae695f
Reviewed-on: https://skia-review.googlesource.com/22725
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
1 file changed