Remove guard around getBackendTexture/RenderTarget calls

Bug: skia:
Change-Id: Ia9ad987d4af183985724f32b022553af0fcb2b78
Reviewed-on: https://skia-review.googlesource.com/120124
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
4 files changed