Make all random path benchs non-rendering

https://codereview.appspot.com/6490111/



git-svn-id: http://skia.googlecode.com/svn/trunk@5527 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/bench/PathBench.cpp b/bench/PathBench.cpp
index 2e07f67..dd5041d 100644
--- a/bench/PathBench.cpp
+++ b/bench/PathBench.cpp
@@ -223,6 +223,7 @@
 class RandomPathBench : public SkBenchmark {
 public:
     RandomPathBench(void* param) : INHERITED(param) {
+        fIsRendering = false;
     }
 
 protected: