Bug 1564851 - Disable gfx.webrender.all.qualified by default.

Differential Revision: https://phabricator.services.mozilla.com/D43456

--HG--
extra : moz-landing-system : lando

gfx/thebes/gfxPlatform.cpp

@@ -762,7 +762,7 @@ WebRenderMemoryReporter::CollectReports(nsIHandleReportCallback* aHandleReport,
 #undef REPORT_DATA_STORE
 
 static const char* const WR_ROLLOUT_PREF = "gfx.webrender.all.qualified";
-static const bool WR_ROLLOUT_PREF_DEFAULTVALUE = true;
+static const bool WR_ROLLOUT_PREF_DEFAULTVALUE = false;
 static const char* const WR_ROLLOUT_DEFAULT_PREF =
     "gfx.webrender.all.qualified.default";
 static const bool WR_ROLLOUT_DEFAULT_PREF_DEFAULTVALUE = false;