Bug 1696158 - Move CanSavePresentation to the parent process. Keep track of various flags for deciding whether to put a page in BFCache. r=smaug

Differential Revision: https://phabricator.services.mozilla.com/D110231

dom/html/HTMLMediaElement.cpp

@@ -86,6 +86,7 @@
 #include "mozilla/dom/VideoTrack.h"
 #include "mozilla/dom/VideoTrackList.h"
 #include "mozilla/dom/WakeLock.h"
+#include "mozilla/dom/WindowGlobalChild.h"
 #include "mozilla/dom/power/PowerManagerService.h"
 #include "mozilla/net/UrlClassifierFeatureFactory.h"
 #include "nsAttrValueInlines.h"
@@ -2239,6 +2240,10 @@ void HTMLMediaElement::AbortExistingLoads() {
     EndSrcMediaStreamPlayback();
   }
 
+  if (mMediaSource) {
+    OwnerDoc()->RemoveMediaElementWithMSE();
+  }
+
   RemoveMediaElementFromURITable();
   mLoadingSrcTriggeringPrincipal = nullptr;
   DDLOG(DDLogCategory::Property, "loading_src", "");
@@ -2549,6 +2554,10 @@ void HTMLMediaElement::SelectResource() {
           !mIsLoadingFromSourceChildren,
           "Should think we're not loading from source children by default");
 
+      if (!mMediaSource) {
+        OwnerDoc()->AddMediaElementWithMSE();
+      }
+
       RemoveMediaElementFromURITable();
       if (!mSrcMediaSource) {
         mLoadingSrc = uri;
@@ -2812,6 +2821,10 @@ void HTMLMediaElement::LoadFromSourceChildren() {
       return;
     }
 
+    if (!mMediaSource) {
+      OwnerDoc()->AddMediaElementWithMSE();
+    }
+
     RemoveMediaElementFromURITable();
     mLoadingSrc = uri;
     mLoadingSrcTriggeringPrincipal = childSrc->GetSrcTriggeringPrincipal();
@@ -7652,6 +7665,15 @@ bool HTMLMediaElement::IsBeingUsedInPictureInPictureMode() const {
   return static_cast<const HTMLVideoElement*>(this)->IsCloningElementVisually();
 }
 
+void HTMLMediaElement::NodeInfoChanged(Document* aOldDoc) {
+  if (mMediaSource) {
+    OwnerDoc()->AddMediaElementWithMSE();
+    aOldDoc->RemoveMediaElementWithMSE();
+  }
+
+  nsGenericHTMLElement::NodeInfoChanged(aOldDoc);
+}
+
 }  // namespace mozilla::dom
 
 #undef LOG