Backed out changeset 78024e47a901 (bug 1657822) for failures on test_bug1303704.html. CLOSED TREE

gfx/thebes/gfxPlatform.cpp

@@ -3213,6 +3213,7 @@ uint32_t gfxPlatform::TargetFrameRate() {
 
 /* static */
 bool gfxPlatform::UseDesktopZoomingScrollbars() {
+  // bug 1657822 to enable this by default
   return StaticPrefs::apz_allow_zooming() &&
          !StaticPrefs::apz_force_disable_desktop_zooming_scrollbars();
 }

layout/reftests/mathml/reftest.list

@@ -365,7 +365,7 @@ pref(mathml.deprecated_alignment_attributes.disabled,false) fuzzy-if(geckoview&&
 pref(mathml.deprecated_alignment_attributes.disabled,false) fuzzy-if(geckoview&&webrender,0-239,0-271) == mfrac-D-4.html mfrac-D-4-ref.html
 == mfrac-E-1.html mfrac-E-1-ref.html
 == shadow-dom-1.html shadow-dom-1-ref.html
-pref(ui.useOverlayScrollbars,1) pref(dom.meta-viewport.enabled,true) pref(font.size.inflation.emPerLine,25) fuzzy-if(webrender&&!gtkWidget,0-255,0-324) fuzzy-if(webrender&&gtkWidget,0-255,0-66) == font-inflation-1.html font-inflation-1-ref.html  # gtkWidget due to Bug 1607294
+pref(dom.meta-viewport.enabled,true) pref(font.size.inflation.emPerLine,25) fuzzy-if(webrender&&!gtkWidget,0-255,0-324) fuzzy-if(webrender&&gtkWidget,0-255,0-66) == font-inflation-1.html font-inflation-1-ref.html  # gtkWidget due to Bug 1607294
 test-pref(font.minimum-size.x-math,40) == default-font.html default-font-ref.html
 != radicalbar-1.html about:blank
 != radicalbar-1a.html about:blank

modules/libpref/init/StaticPrefList.yaml

@@ -459,7 +459,7 @@
 # new scrollbar code for desktop zooming
 - name: apz.force_disable_desktop_zooming_scrollbars
   type: RelaxedAtomicBool
-  value: @IS_ANDROID@
+  value: true
   mirror: always
 
 #ifdef MOZ_WIDGET_GTK