Bug 881251 - Add mute/unmute to media context menus. r=lucasr

mobile/android/chrome/content/browser.js

@@ -543,6 +543,18 @@ var BrowserApp = {
         aTarget.mozRequestFullScreen();
       });
 
+    NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.mute"),
+      NativeWindow.contextmenus.mediaContext("media-unmuted"),
+      function(aTarget) {
+        aTarget.muted = true;
+      });
+  
+    NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.unmute"),
+      NativeWindow.contextmenus.mediaContext("media-muted"),
+      function(aTarget) {
+        aTarget.muted = false;
+      });
+
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.copyImageLocation"),
       NativeWindow.contextmenus.imageLocationCopyableContext,
       function(aTarget) {
@@ -1942,6 +1954,12 @@ var NativeWindow = {
             let controls = aElt.controls;
             if (!controls && aMode == "media-hidingcontrols")
               return true;
+
+            let muted = aElt.muted;
+            if (muted && aMode == "media-muted")
+              return true;
+            else if (!muted && aMode == "media-unmuted")
+              return true;
           }
           return false;
         }

mobile/android/locales/en-US/chrome/browser.properties

@@ -164,6 +164,8 @@ contextmenu.playMedia=Play
 contextmenu.pauseMedia=Pause
 contextmenu.shareMedia=Share Video
 contextmenu.showControls2=Show Controls
+contextmenu.mute=Mute
+contextmenu.unmute=Unmute
 contextmenu.saveVideo=Save Video
 contextmenu.saveAudio=Save Audio
 contextmenu.addToContacts=Add to Contacts