cros: Turn off Triliear Filtering by default

Trilinear filtering uses many memories which can cause tile missing in
WindowCycleList view and Overview mode. Turn it off by default.

Bug: 871984
Test: manual.
Change-Id: Icbe758c2a2c707ca58aa0816a76436fb487144df
Reviewed-on: https://chromium-review.googlesource.com/1166199Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Tao Wu <wutao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581386}

ash/public/cpp/ash_features.cc

@@ -43,7 +43,7 @@ const base::Feature kSystemTrayUnified{"SystemTrayUnified",
                                        base::FEATURE_ENABLED_BY_DEFAULT};
 
 const base::Feature kTrilinearFiltering{"TrilinearFiltering",
-                                        base::FEATURE_ENABLED_BY_DEFAULT};
+                                        base::FEATURE_DISABLED_BY_DEFAULT};
 
 const base::Feature kViewsLogin{"ViewsLogin", base::FEATURE_ENABLED_BY_DEFAULT};