Media Remoting: Add interstitial elements to media element shadow dom.

third_party/WebKit/Source/core/layout/LayoutMedia.cpp

Index: third_party/WebKit/Source/core/layout/LayoutMedia.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutMedia.cpp b/third_party/WebKit/Source/core/layout/LayoutMedia.cpp
index d124303a4a5cdff4858b60a54092d174bda3bb3d..690574eeaae27d0c382f3359e851a5e5f0eab167 100644
--- a/third_party/WebKit/Source/core/layout/LayoutMedia.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutMedia.cpp
@@ -59,16 +59,21 @@ void LayoutMedia::layout() {
 // overlap checking, see LayoutVTTCue.
 #if DCHECK_IS_ON()
   bool seenTextTrackContainer = false;
+  bool seenMediaRemotingInterstitial = false;
 #endif
   for (LayoutObject* child = m_children.lastChild(); child;
        child = child->previousSibling()) {
 #if DCHECK_IS_ON()
-    if (child->node()->isMediaControls())
-      ASSERT(!seenTextTrackContainer);
-    else if (child->node()->isTextTrackContainer())
+    if (child->node()->isMediaControls()) {
+      DCHECK(!seenTextTrackContainer);
+    } else if (child->node()->isTextTrackContainer()) {
       seenTextTrackContainer = true;
-    else
+      DCHECK(!seenMediaRemotingInterstitial);
+    } else if (child->node()->isMediaRemotingInterstitial()) {
+      seenMediaRemotingInterstitial = true;
+    } else {
       NOTREACHED();
+    }
 #endif
 
     // TODO(mlamouri): we miss some layouts because needsLayout returns false in
@@ -115,7 +120,8 @@ bool LayoutMedia::isChildAllowed(LayoutObject* child,
   if (child->node()->isMediaControls())
     return child->isFlexibleBox();
 
-  if (child->node()->isTextTrackContainer())
+  if (child->node()->isTextTrackContainer() ||
+      child->node()->isMediaRemotingInterstitial())
     return true;
 
   return false;