Ensure GL initialization only happens once, and provide common init path

gpu/tools/compositor_model_bench/compositor_model_bench.cc

Index: gpu/tools/compositor_model_bench/compositor_model_bench.cc
diff --git a/gpu/tools/compositor_model_bench/compositor_model_bench.cc b/gpu/tools/compositor_model_bench/compositor_model_bench.cc
index 44ce333bf679d65ef75c686b78956d2e670ab6e4..6c60382be355ee5b025d5336a827968e02fca3a8 100644
--- a/gpu/tools/compositor_model_bench/compositor_model_bench.cc
+++ b/gpu/tools/compositor_model_bench/compositor_model_bench.cc
@@ -31,11 +31,10 @@
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/time/time.h"
-
 #include "gpu/tools/compositor_model_bench/render_model_utils.h"
 #include "gpu/tools/compositor_model_bench/render_models.h"
 #include "gpu/tools/compositor_model_bench/render_tree.h"
-
+#include "ui/gl/gl_surface.h"
 
 using base::TimeTicks;
 using base::DirectoryExists;
@@ -186,8 +185,8 @@ class Simulator {
 
   // Initialize the OpenGL context.
   bool InitGLContext() {
-    if (!InitializeStaticGLBindings(gfx::kGLImplementationDesktopGL)) {
-      LOG(FATAL) << "InitializeStaticGLBindings failed";
+    if (!gfx::GLSurface::InitializeOneOff()) {
+      LOG(FATAL) << "gfx::GLSurface::InitializeOneOff failed";
       return false;
     }