change all patheffect methods to const, in preparation for marking its
subclasses as immutable/re-entrant safe.
Review URL: https://codereview.appspot.com/6949071

git-svn-id: http://skia.googlecode.com/svn/trunk@6877 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/effects/SkCornerPathEffect.h b/include/effects/SkCornerPathEffect.h
index 88afea3..ee89219 100644
--- a/include/effects/SkCornerPathEffect.h
+++ b/include/effects/SkCornerPathEffect.h
@@ -23,9 +23,8 @@
     SkCornerPathEffect(SkScalar radius);
     virtual ~SkCornerPathEffect();
 
-    // overrides for SkPathEffect
-    //  This method is not exported to java.
-    virtual bool filterPath(SkPath* dst, const SkPath& src, SkStrokeRec*) SK_OVERRIDE;
+    virtual bool filterPath(SkPath* dst, const SkPath& src,
+                            SkStrokeRec*) const SK_OVERRIDE;
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkCornerPathEffect)