Simplify GrSWMaskHelper

bench/nanobench.cpp

Index: bench/nanobench.cpp
diff --git a/bench/nanobench.cpp b/bench/nanobench.cpp
index 69f1c4f9885659b8c49b849273c629a62054e238..8bc40cc460e82f83fd7107133fd9162267256b5c 100644
--- a/bench/nanobench.cpp
+++ b/bench/nanobench.cpp
@@ -98,8 +98,6 @@ DEFINE_double(overheadGoal, 0.0001,
               "Loop until timer overhead is at most this fraction of our measurments.");
 DEFINE_double(gpuMs, 5, "Target bench time in millseconds for GPU.");
 DEFINE_int32(gpuFrameLag, 5, "If unknown, estimated maximum number of frames GPU allows to lag.");
-DEFINE_bool(gpuCompressAlphaMasks, false, "Compress masks generated from falling back to "
-                                          "software path rendering.");
 
 DEFINE_string(outResultsFile, "", "If given, write results here as JSON.");
 DEFINE_int32(maxCalibrationAttempts, 3,
@@ -1036,7 +1034,6 @@ int nanobench_main() {
 
 #if SK_SUPPORT_GPU
     GrContextOptions grContextOpts;
-    grContextOpts.fDrawPathToCompressedTexture = FLAGS_gpuCompressAlphaMasks;
     gGrFactory.reset(new GrContextFactory(grContextOpts));
 #endif