Keep playing audio even when opening another tab, going to another app etc.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 6c4573fb75aecf16a14461ae0f5f84b162823718..0ade026dfaef2f68c0499a4a667794575b8c4eaf 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -5681,7 +5681,11 @@ void RenderViewImpl::OnWasHidden() {
 
 #if defined(OS_ANDROID)
   // Inform WebMediaPlayerManagerAndroid to release all media player resources.
-  media_player_manager_->ReleaseMediaResources();
+  // unless some media is playing.
+  // If something is in progress the resource will not be freed, it will
+  // only be freed once the tab is destroyed or if the user navigates away
+  // via WebMediaPlayerAndroid::Destroy
+  media_player_manager_->ReleaseMediaResourcesIfNotPlaying();
 #endif
 
   if (webview()) {