[SPv2] Use foreign layer support to enable composited video.

third_party/WebKit/Source/platform/graphics/paint/DisplayItem.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/DisplayItem.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.cpp b/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.cpp
index c786690d51fd5f3735c402ca1d490b9f0af14640..12eeecba5ea963027d204fc983c5d94226176690 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/DisplayItem.cpp
@@ -132,6 +132,7 @@ static String foreignLayerTypeAsDebugString(DisplayItem::Type type)
 {
     switch (type) {
         DEBUG_STRING_CASE(ForeignLayerPlugin);
+        DEBUG_STRING_CASE(ForeignLayerVideo);
         DEFAULT_CASE;
     }
 }