Bug 1667116 - Request to stay unredirected on WR/OGL, too. r=stransky

Until bug 1617002 Firefox would unintendedly not get unredirected on X11
when used with WR and OpenGL as it didn't fullfill the requirements -
not being transparent.

Now that this is fixed, fullscreen unredirection can happen on certain
compositors. For the basic compositor we already explicitely ask to not
get unredirected - do that for all backends.

Also adapt tests accordingly.

Differential Revision: https://phabricator.services.mozilla.com/D92180

browser/base/content/test/performance/browser_startup_syncIPC.js

@@ -20,20 +20,14 @@ const startupPhases = {
   // to run before we have even selected the user profile.
   "before profile selection": [],
 
-  "before opening first browser window": [
-    {
-      name: "PLayerTransaction::Msg_GetTextureFactoryIdentifier",
-      condition: LINUX,
-      maxCount: 1,
-    },
-  ],
+  "before opening first browser window": [],
 
   // We reach this phase right after showing the first browser window.
   // This means that any I/O at this point delayed first paint.
   "before first paint": [
     {
       name: "PLayerTransaction::Msg_GetTextureFactoryIdentifier",
-      condition: MAC,
+      condition: MAC || LINUX,
       maxCount: 1,
     },
     {
@@ -230,7 +224,7 @@ const startupPhases = {
     {
       // bug 1554234
       name: "PLayerTransaction::Msg_GetTextureFactoryIdentifier",
-      condition: WIN,
+      condition: WIN || LINUX,
       ignoreIfUnused: true, // intermittently occurs in "before handling user events"
       maxCount: 1,
     },

widget/gtk/nsWindow.cpp

@@ -7959,17 +7959,17 @@ void nsWindow::SetProgress(unsigned long progressPercent) {
 
 #ifdef MOZ_X11
 void nsWindow::SetCompositorHint(WindowComposeRequest aState) {
-  if (mIsX11Display &&
-      (!GetLayerManager() ||
-       GetLayerManager()->GetBackendType() == LayersBackend::LAYERS_BASIC)) {
-    gulong value = aState;
-    GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
-    gdk_property_change(gtk_widget_get_window(mShell),
-                        gdk_atom_intern("_NET_WM_BYPASS_COMPOSITOR", FALSE),
-                        cardinal_atom,
-                        32,  // format
-                        GDK_PROP_MODE_REPLACE, (guchar*)&value, 1);
+  if (!mIsX11Display) {
+    return;
   }
+
+  gulong value = aState;
+  GdkAtom cardinal_atom = gdk_x11_xatom_to_atom(XA_CARDINAL);
+  gdk_property_change(gtk_widget_get_window(mShell),
+                      gdk_atom_intern("_NET_WM_BYPASS_COMPOSITOR", FALSE),
+                      cardinal_atom,
+                      32,  // format
+                      GDK_PROP_MODE_REPLACE, (guchar*)&value, 1);
 }
 #endif