Replace macro with constexpr now that we require C++14.

Change-Id: I71531f4cb3b306687c0d532d5e5e9c1c36ed5357
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/406476
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
diff --git a/src/gpu/GrPipeline.h b/src/gpu/GrPipeline.h
index e93da0b..f5415c2c 100644
--- a/src/gpu/GrPipeline.h
+++ b/src/gpu/GrPipeline.h
@@ -29,7 +29,7 @@
 class GrSurfaceDrawContext;
 
 /**
- * This immutable object contains information needed to set build a shader program and set API
+ * This immutable object contains information needed to build a shader program and set API
  * state for a draw. It is used along with a GrGeometryProcessor and a source of geometric
  * data to draw.
  */