Fix for nexus 5 crashing in GL benches

GLBenches do not expect gl state  to change between onPerCanvasPreDraw and *PostDraw, but we do a clear and sometimes we clear as draw.  This causes us to bind vertex objects / programs / etc.

This change creates two new virtual methods which are called right before and immediately after timing.

BUG=skia:

Review URL: https://codereview.chromium.org/1379853003

1 files changed, 1 insertions, 1 deletions

diff --git a/bench/FSRectBench.cpp b/bench/FSRectBench.cpp
index 03d1504bb3..4c7173bc29 100644
--- a/bench/FSRectBench.cpp
+++ b/bench/FSRectBench.cpp
@@ -22,7 +22,7 @@ public:
 protected:
     const char* onGetName() override { return "fullscreen_rects"; }
 
-    void onPreDraw() override {
+    void onDelayedSetup() override {
         if (!fInit) {
             SkRandom rand;
             static const SkScalar kMinOffset = 0;