[epiphany] Revert "Enable web process sandbox"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 724eb5edad28b7dc9911483dfc27edd254febf86
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Thu Nov 29 10:13:26 2018 -0600

    Revert "Enable web process sandbox"
    
    This reverts commit a97e962f547671e6bd24c1d6d63c736b9597f317.
    
    Fixes #592

 embed/ephy-embed-shell.c | 2 --
 meson.build              | 2 +-
 2 files changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/embed/ephy-embed-shell.c b/embed/ephy-embed-shell.c
index a6061692f..2b1ce4fdd 100644
--- a/embed/ephy-embed-shell.c
+++ b/embed/ephy-embed-shell.c
@@ -1215,8 +1215,6 @@ ephy_embed_shell_startup (GApplication *application)
                     G_CALLBACK (web_extension_password_manager_request_save_received_cb),
                     shell);
 
-  webkit_web_context_set_sandbox_enabled (priv->web_context, TRUE);
-
   ephy_embed_shell_setup_process_model (shell);
   g_signal_connect_object (priv->web_context, "initialize-web-extensions",
                            G_CALLBACK (initialize_web_extensions),
diff --git a/meson.build b/meson.build
index 3459f5261..ccfc48088 100644
--- a/meson.build
+++ b/meson.build
@@ -70,7 +70,7 @@ endif
 glib_requirement = '>= 2.52.0'
 gtk_requirement = '>= 3.22.13'
 nettle_requirement = '>= 3.2'
-webkitgtk_requirement = '>= 2.23.1'
+webkitgtk_requirement = '>= 2.21.92'
 
 cairo_dep = dependency('cairo', version: '>= 1.2')
 gcr_dep = dependency('gcr-3', version: '>= 3.5.5')