[epiphany] Disable hardware acceleration by default again

[Michael Catanzaro <mcatanzaro src gnome org>]

commit f0ccff59b66f411a2183a5d716549d14f7f71c81
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sat Feb 2 09:45:15 2019 -0600

    Disable hardware acceleration by default again
    
    I reenabled this hoping that
    https://bugs.webkit.org/show_bug.cgi?id=192522 might have been fixed,
    but not so.

 data/org.gnome.epiphany.gschema.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/org.gnome.epiphany.gschema.xml b/data/org.gnome.epiphany.gschema.xml
index 643cd3e28..c49207002 100644
--- a/data/org.gnome.epiphany.gschema.xml
+++ b/data/org.gnome.epiphany.gschema.xml
@@ -229,7 +229,7 @@
                        <description>Keep track of last download directory</description>
                </key>
                <key name="hardware-acceleration-policy" 
enum="org.gnome.Epiphany.EphyPrefsWebHardwareAccelerationPolicy">
-                       <default>'on-demand'</default>
+                       <default>'never'</default>
                        <summary>Hardware acceleration policy</summary>
                        <description>Whether to enable hardware acceleration. Possible values are 
“on-demand”, “always”, and “never”. Hardware acceleration may be required to achieve acceptable performance 
on embedded devices, but increases memory usage requirements and could expose severe hardware-specific 
graphics driver bugs. When the policy is “on-demand”, hardware acceleration will be used only when required 
to display 3D transforms.</description>
                </key>