Bug 963550 - Warn about OpenGL non-support only once during execution instead of spamming the log. r=bjacob

widget/xpwidgets/nsBaseWidget.cpp

@@ -895,7 +895,11 @@ nsBaseWidget::ComputeShouldAccelerate(bool aDefault)
     return true;
 
   if (!whitelisted) {
-    NS_WARNING("OpenGL-accelerated layers are not supported on this system");
+    static int tell_me_once = 0;
+    if (!tell_me_once) {
+      NS_WARNING("OpenGL-accelerated layers are not supported on this system");
+      tell_me_once = 1;
+    }
 #ifdef MOZ_ANDROID_OMTC
     NS_RUNTIMEABORT("OpenGL-accelerated layers are a hard requirement on this platform. "
                     "Cannot continue without support for them");