[epiphany] Revert "Try reenabling on-demand hardware acceleration"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ef52772d9845a8e8f52585c64117acd0106d1dbc
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Sep 29 11:59:45 2019 -0500

    Revert "Try reenabling on-demand hardware acceleration"
    
    This reverts commit 2b0064cfb7ca25212b7445a55adbe8248ba4373d.
    
    I'm seeing only white pages when AC mode is triggered in Tech Preview.
    
    It's unusable and I'm not going to debug this myself. Revert.

 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 eda2f7e1a..e32d33167 100644
--- a/data/org.gnome.epiphany.gschema.xml
+++ b/data/org.gnome.epiphany.gschema.xml
@@ -244,7 +244,7 @@
                        <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>