Keep paint color range/precision into ops and GPs (using GrColor4h)

We still degrade to bytes when creating vertices (tagged TODO4F).

Note: Guarded for Chrome (by making GrColor4h a wrapper around
GrColor).

Bug: skia:
Change-Id: Id8a1d9eec7978d52b059cd9952666bc1217ee073
Reviewed-on: https://skia-review.googlesource.com/c/165527
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrProcessorSet.cpp b/src/gpu/GrProcessorSet.cpp
index e4da038..176e2c3 100644
--- a/src/gpu/GrProcessorSet.cpp
+++ b/src/gpu/GrProcessorSet.cpp
@@ -159,7 +159,8 @@
 GrProcessorSet::Analysis GrProcessorSet::finalize(const GrProcessorAnalysisColor& colorInput,
                                                   const GrProcessorAnalysisCoverage coverageInput,
                                                   const GrAppliedClip* clip, bool isMixedSamples,
-                                                  const GrCaps& caps, GrColor* overrideInputColor) {
+                                                  const GrCaps& caps,
+                                                  GrColor4h* overrideInputColor) {
     SkASSERT(!this->isFinalized());
     SkASSERT(!fFragmentProcessorOffset);