Add common GLFence::IsSupported() check

gpu/command_buffer/service/feature_info.cc

Index: gpu/command_buffer/service/feature_info.cc
diff --git a/gpu/command_buffer/service/feature_info.cc b/gpu/command_buffer/service/feature_info.cc
index 94eb4cc0a231f8776617edadf52fe63d95b725d7..b3f1b935ac29a55803de61ec5dcf2007917b49f9 100644
--- a/gpu/command_buffer/service/feature_info.cc
+++ b/gpu/command_buffer/service/feature_info.cc
@@ -14,6 +14,7 @@
 #include "base/strings/string_util.h"
 #include "gpu/command_buffer/service/gl_utils.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
+#include "ui/gl/gl_fence.h"
 #include "ui/gl/gl_implementation.h"
 
 namespace gpu {
@@ -789,18 +790,14 @@ void FeatureInfo::InitializeFeatures() {
     feature_flags_.ext_shader_texture_lod = true;
   }
 
-  bool egl_khr_fence_sync = false;
 #if !defined(OS_MACOSX)
   if (workarounds_.disable_egl_khr_fence_sync) {
     gfx::g_driver_egl.ext.b_EGL_KHR_fence_sync = false;
   }
-  egl_khr_fence_sync = gfx::g_driver_egl.ext.b_EGL_KHR_fence_sync;
 #endif
   if (workarounds_.disable_arb_sync)
     gfx::g_driver_gl.ext.b_GL_ARB_sync = false;
-  bool ui_gl_fence_works = is_es3 || extensions.Contains("GL_NV_fence") ||
-                           gfx::g_driver_gl.ext.b_GL_ARB_sync ||
-                           egl_khr_fence_sync;
+  bool ui_gl_fence_works = gfx::GLFence::IsSupported();
   UMA_HISTOGRAM_BOOLEAN("GPU.FenceSupport", ui_gl_fence_works);
 
   feature_flags_.map_buffer_range =