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, 2 insertions, 2 deletions

diff --git a/bench/PictureNestingBench.cpp b/bench/PictureNestingBench.cpp
index 48f2ef46c5..e315fe6dbd 100644
--- a/bench/PictureNestingBench.cpp
+++ b/bench/PictureNestingBench.cpp
@@ -139,8 +139,8 @@ public:
         : INHERITED("playback", maxLevel, maxPictureLevel) {
     }
 protected:
-    void onPreDraw() override {
-        this->INHERITED::onPreDraw();
+    void onDelayedSetup() override {
+        this->INHERITED::onDelayedSetup();
 
         SkIPoint canvasSize = onGetSize();
         SkPictureRecorder recorder;