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/MatrixBench.cpp b/bench/MatrixBench.cpp
index 75736aa143..9471f18008 100644
--- a/bench/MatrixBench.cpp
+++ b/bench/MatrixBench.cpp
@@ -146,7 +146,7 @@ public:
     DecomposeMatrixBench() : INHERITED("decompose") {}
 
 protected:
-    void onPreDraw() override {
+    void onDelayedSetup() override {
         for (int i = 0; i < 10; ++i) {
             SkScalar rot0 = (fRandom.nextBool()) ? fRandom.nextRangeF(-180, 180) : 0.0f;
             SkScalar sx = fRandom.nextRangeF(-3000.f, 3000.f);