Add GrOpsRenderPass::bindPipeline()

Clients now must call bindPipeline() before drawing.

Also renames GrOpsRenderPass::draw() to drawMeshes(), in order to
ensure every call site gets updated. drawMeshes() will soon be
replaced by individual calls for each draw type (indexed, instanced,
indexed-patterned, indirect, etc.).

Change-Id: I93ef579ded7d0048c5aa1bf1d7c0eb7bc1cd27b2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/270424
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
26 files changed