Fix EGL configs with GLSurfaceOzoneSurfaceless.

ui/ozone/platform/x11/x11_surface_factory.cc

Index: ui/ozone/platform/x11/x11_surface_factory.cc
diff --git a/ui/ozone/platform/x11/x11_surface_factory.cc b/ui/ozone/platform/x11/x11_surface_factory.cc
index 4e96c9b48d331fc1a3abdffd98f18484f82af735..8036a0405aa5063b6e55d6576023fd9c29a94695 100644
--- a/ui/ozone/platform/x11/x11_surface_factory.cc
+++ b/ui/ozone/platform/x11/x11_surface_factory.cc
@@ -68,7 +68,7 @@ void* /* EGLConfig */ X11SurfaceEGL::GetEGLSurfaceConfig(
                              EGL_RENDERABLE_TYPE,
                              EGL_OPENGL_ES2_BIT,
                              EGL_SURFACE_TYPE,
-                             EGL_WINDOW_BIT,
+                             EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
                              EGL_NONE};
 
   // Get the depth of XWindow for surface
@@ -126,6 +126,26 @@ bool X11SurfaceFactory::LoadEGLGLES2Bindings(
   return LoadDefaultEGLGLES2Bindings(add_gl_library, set_gl_get_proc_address);
 }
 
+const int32_t* X11SurfaceFactory::GetEGLSurfaceProperties(
+    const int32_t* desired_list) {
+  static const EGLint kConfigAttribs[] = {EGL_BUFFER_SIZE,
+                                          32,
+                                          EGL_ALPHA_SIZE,
+                                          8,
+                                          EGL_BLUE_SIZE,
+                                          8,
+                                          EGL_GREEN_SIZE,
+                                          8,
+                                          EGL_RED_SIZE,
+                                          8,
+                                          EGL_RENDERABLE_TYPE,
+                                          EGL_OPENGL_ES2_BIT,
+                                          EGL_SURFACE_TYPE,
+                                          EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
+                                          EGL_NONE};
+  return kConfigAttribs;
+}
+
 intptr_t X11SurfaceFactory::GetNativeDisplay() {
   return reinterpret_cast<intptr_t>(gfx::GetXDisplay());
 }