Reverting revert of r11862 (Constify SkFlattenable::getFactory()) or reverting r11871.



git-svn-id: http://skia.googlecode.com/svn/trunk@11876 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/effects/SkDashPathEffect.cpp b/src/effects/SkDashPathEffect.cpp
index be06591..4aa46ab 100644
--- a/src/effects/SkDashPathEffect.cpp
+++ b/src/effects/SkDashPathEffect.cpp
@@ -528,7 +528,7 @@
     return true;
 }
 
-SkFlattenable::Factory SkDashPathEffect::getFactory() {
+SkFlattenable::Factory SkDashPathEffect::getFactory() const {
     return fInitialDashLength < 0 ? NULL : CreateProc;
 }