Rename vars and functions from 'glslcaps'->'shadercaps'

Change-Id: I34d226d866dd4ba8e5f33f95cb8cbf01292f9314
Reviewed-on: https://skia-review.googlesource.com/5312
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/effects/gradients/SkRadialGradient.cpp b/src/effects/gradients/SkRadialGradient.cpp
index 5c4aabd..887410a 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -330,7 +330,7 @@
     t.append(")");
     this->emitColor(args.fFragBuilder,
                     args.fUniformHandler,
-                    args.fGLSLCaps,
+                    args.fShaderCaps,
                     ge, t.c_str(),
                     args.fOutputColor,
                     args.fInputColor,