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/SkLightingImageFilter.cpp b/src/effects/SkLightingImageFilter.cpp
index 6ad0618..75947e8 100644
--- a/src/effects/SkLightingImageFilter.cpp
+++ b/src/effects/SkLightingImageFilter.cpp
@@ -1864,7 +1864,7 @@
             fragBuilder->codeAppendf("vec4 %s;", temp.c_str());
             fDomain.sampleTexture(fragBuilder,
                                   args.fUniformHandler,
-                                  args.fGLSLCaps,
+                                  args.fShaderCaps,
                                   le.domain(),
                                   temp.c_str(),
                                   texCoords,