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/BlurImageFilterBench.cpp b/bench/BlurImageFilterBench.cpp
index 8bfd005f44..d7d3eb2bc3 100644
--- a/bench/BlurImageFilterBench.cpp
+++ b/bench/BlurImageFilterBench.cpp
@@ -35,7 +35,7 @@ protected:
         return fName.c_str();
     }
 
-    void onPreDraw() override {
+    void onDelayedSetup() override {
         if (!fInitialized) {
             make_checkerboard();
             fInitialized = true;