Make onPrepareDraws const

src/gpu/GrOvalRenderer.cpp

Index: src/gpu/GrOvalRenderer.cpp
diff --git a/src/gpu/GrOvalRenderer.cpp b/src/gpu/GrOvalRenderer.cpp
index c66e12575c83309916403e0111eb756e835112eb..37a5d5042b4f6ff4a81fd17eb10a2e565d215afa 100644
--- a/src/gpu/GrOvalRenderer.cpp
+++ b/src/gpu/GrOvalRenderer.cpp
@@ -692,7 +692,7 @@ private:
         fBatch.fCoverageIgnored = !opt.readsCoverage();
     }
 
-    void onPrepareDraws(Target* target) override {
+    void onPrepareDraws(Target* target) const override {
         SkMatrix invert;
         if (!this->viewMatrix().invert(&invert)) {
             return;
@@ -717,7 +717,7 @@ private:
         }
 
         for (int i = 0; i < instanceCount; i++) {
-            Geometry& geom = fGeoData[i];
+            const Geometry& geom = fGeoData[i];
 
             SkScalar innerRadius = geom.fInnerRadius;
             SkScalar outerRadius = geom.fOuterRadius;
@@ -911,7 +911,7 @@ private:
         fBatch.fCoverageIgnored = !opt.readsCoverage();
     }
 
-    void onPrepareDraws(Target* target) override {
+    void onPrepareDraws(Target* target) const override {
         SkMatrix invert;
         if (!this->viewMatrix().invert(&invert)) {
             return;
@@ -936,7 +936,7 @@ private:
         }
 
         for (int i = 0; i < instanceCount; i++) {
-            Geometry& geom = fGeoData[i];
+            const Geometry& geom = fGeoData[i];
 
             SkScalar xRadius = geom.fXRadius;
             SkScalar yRadius = geom.fYRadius;
@@ -1183,7 +1183,7 @@ private:
         fBatch.fCoverageIgnored = !opt.readsCoverage();
     }
 
-    void onPrepareDraws(Target* target) override {
+    void onPrepareDraws(Target* target) const override {
         // Setup geometry processor
         SkAutoTUnref<GrGeometryProcessor> gp(DIEllipseEdgeEffect::Create(this->color(),
                                                                          this->viewMatrix(),
@@ -1203,7 +1203,7 @@ private:
         }
 
         for (int i = 0; i < instanceCount; i++) {
-            Geometry& geom = fGeoData[i];
+            const Geometry& geom = fGeoData[i];
 
             SkScalar xRadius = geom.fXRadius;
             SkScalar yRadius = geom.fYRadius;
@@ -1537,7 +1537,7 @@ private:
         fBatch.fCoverageIgnored = !opt.readsCoverage();
     }
 
-    void onPrepareDraws(Target* target) override {
+    void onPrepareDraws(Target* target) const override {
         // reset to device coordinates
         SkMatrix invert;
         if (!this->viewMatrix().invert(&invert)) {
@@ -1572,7 +1572,7 @@ private:
         }
 
         for (int i = 0; i < instanceCount; i++) {
-            Geometry& args = fGeoData[i];
+            const Geometry& args = fGeoData[i];
 
             SkScalar outerRadius = args.fOuterRadius;
 
@@ -1716,7 +1716,7 @@ private:
         fBatch.fCoverageIgnored = !opt.readsCoverage();
     }
 
-    void onPrepareDraws(Target* target) override {
+    void onPrepareDraws(Target* target) const override {
         // reset to device coordinates
         SkMatrix invert;
         if (!this->viewMatrix().invert(&invert)) {
@@ -1751,7 +1751,7 @@ private:
         }
 
         for (int i = 0; i < instanceCount; i++) {
-            Geometry& args = fGeoData[i];
+            const Geometry& args = fGeoData[i];
 
             // Compute the reciprocals of the radii here to save time in the shader
             SkScalar xRadRecip = SkScalarInvert(args.fXRadius);