added support for PLS path rendering

include/gpu/GrCaps.h

Index: include/gpu/GrCaps.h
diff --git a/include/gpu/GrCaps.h b/include/gpu/GrCaps.h
index 3a6d27ba6647214fe2c565f31aa4f8e9f7ddf842..552557b2cfe7ec9d979078c580844e4c7ff987ba 100644
--- a/include/gpu/GrCaps.h
+++ b/include/gpu/GrCaps.h
@@ -81,6 +81,8 @@ public:
     */
     bool floatPrecisionVaries() const { return fShaderPrecisionVaries; }
 
+    int pixelLocalStorageSize() const { return fPixelLocalStorageSize; }
+
 protected:
     /** Subclasses must call this after initialization in order to apply caps overrides requested by
         the client. Note that overrides will only reduce the caps never expand them. */
@@ -94,6 +96,7 @@ protected:
 
     bool fShaderPrecisionVaries;
     PrecisionInfo fFloatPrecisions[kGrShaderTypeCount][kGrSLPrecisionCount];
+    int fPixelLocalStorageSize;
 
 private:
     virtual void onApplyOptionsOverrides(const GrContextOptions&) {};