Added window manager graphics performance tests to gl_Bench.

client/deps/glbench/src/main.h

Index: client/deps/glbench/src/main.h
diff --git a/client/deps/glbench/src/main.h b/client/deps/glbench/src/main.h
index 10c1dea41af21b6eb253e43b41c377c67a6c0d8a..ffa73a3899150fd6b44c097f1723354010022dc1 100644
--- a/client/deps/glbench/src/main.h
+++ b/client/deps/glbench/src/main.h
@@ -66,6 +66,11 @@ typedef void (*BenchFunc)(int iter);
 
 uint64_t TimeBench(BenchFunc func, int iter);
 
+// This size is for a window that is very large but will fit on all
+// the displays we care about.
+#define WINDOW_WIDTH 512
+#define WINDOW_HEIGHT 512
+
 #define MAX_ITERATION_DURATION_MS 100000
 // Runs func passing it sequential powers of two (8, 16, 32,...) recording time
 // it took.  The data is then fitted linearly, obtaining slope and bias such