search registered rtconf variables backwards and break when we find the

src/utils/SkRTConf.cpp

Index: src/utils/SkRTConf.cpp
diff --git a/src/utils/SkRTConf.cpp b/src/utils/SkRTConf.cpp
index bc2031f2e847ee001a6a44509feb3189d5fdd55e..e0977fe42f21e39a21a04909610853dc0fdb9cc3 100644
--- a/src/utils/SkRTConf.cpp
+++ b/src/utils/SkRTConf.cpp
@@ -215,9 +215,10 @@ static inline void str_replace(char *s, char search, char replace) {
 template<typename T> bool SkRTConfRegistry::parse(const char *name, T* value) {
     SkString *str = NULL;
 
-    for (int i = 0 ; i < fConfigFileKeys.count() ; i++) {
+    for (int i = fConfigFileKeys.count() - 1 ; i >= 0; i--) {
         if (fConfigFileKeys[i]->equals(name)) {
             str = fConfigFileValues[i];
+            break;
         }
     }