Bug 1709379, don't special case picture in picture mode in tooltips as the button is still a mute button, r=mconley

Differential Revision: https://phabricator.services.mozilla.com/D115555

browser/base/content/tabbrowser-tab.js

@@ -453,16 +453,6 @@
         if (this.multiselected) {
           gBrowser.toggleMuteAudioOnMultiSelectedTabs(this);
         } else {
-          if (
-            event.target.classList.contains("tab-icon-sound") &&
-            this.pictureinpicture
-          ) {
-            // When Picture-in-Picture is open, we repurpose '.tab-icon-sound' as
-            // an inert Picture-in-Picture indicator, and expose the '.tab-icon-overlay'
-            // as the mechanism for muting the tab, so we don't need to handle clicks on
-            // '.tab-icon-sound' in this case.
-            return;
-          }
           this.toggleMuteAudio();
         }
         return;

browser/base/content/tabbrowser.js

@@ -5392,11 +5392,7 @@
               affectedTabsLength,
               gTabBrowserBundle.GetStringFromName("tabs.closeTabs.tooltip")
             ).replace("#1", affectedTabsLength);
-      }
-      // When Picture-in-Picture is open, we repurpose '.tab-icon-sound' as
-      // an inert Picture-in-Picture indicator, so we should display
-      // the default tooltip
-      else if (tab._overPlayingIcon && !tab.pictureinpicture) {
+      } else if (tab._overPlayingIcon) {
         let stringID;
         if (tab.selected) {
           stringID = tab.linkedBrowser.audioMuted