ui: Add EGL_ANDROID_native_fence_sync support.

ui/gl/gl_fence_egl.cc

Index: ui/gl/gl_fence_egl.cc
diff --git a/ui/gl/gl_fence_egl.cc b/ui/gl/gl_fence_egl.cc
index ff066a76726f1059e703edce294e2f4c20b7d20e..81ccd715235cd70373ddc076db7c7ee5b98a02eb 100644
--- a/ui/gl/gl_fence_egl.cc
+++ b/ui/gl/gl_fence_egl.cc
@@ -20,11 +20,14 @@ void GLFenceEGL::SetIgnoreFailures() {
   g_ignore_egl_sync_failures = true;
 }
 
-GLFenceEGL::GLFenceEGL() {
+GLFenceEGL::GLFenceEGL() : GLFenceEGL(EGL_SYNC_FENCE_KHR, nullptr) {
+  glFlush();
+}
+
+GLFenceEGL::GLFenceEGL(GLenum type, EGLint* attribs) {
   display_ = eglGetCurrentDisplay();
-  sync_ = eglCreateSyncKHR(display_, EGL_SYNC_FENCE_KHR, NULL);
+  sync_ = eglCreateSyncKHR(display_, type, attribs);
   DCHECK(sync_ != EGL_NO_SYNC_KHR);
-  glFlush();
 }
 
 bool GLFenceEGL::HasCompleted() {