Remove HTMLVideoElement.

sky/engine/core/core.gni

Index: sky/engine/core/core.gni
diff --git a/sky/engine/core/core.gni b/sky/engine/core/core.gni
index 2531a7b15ac501ef609b833b619237a8dcaf0339..87aa9d419a7dbb1ce7327ffbac20e0323f472408 100644
--- a/sky/engine/core/core.gni
+++ b/sky/engine/core/core.gni
@@ -777,8 +777,6 @@ sky_core_files = [
   "html/HTMLTemplateElement.h",
   "html/HTMLTitleElement.cpp",
   "html/HTMLTitleElement.h",
-  "html/HTMLVideoElement.cpp",
-  "html/HTMLVideoElement.h",
   "html/ImageData.cpp",
   "html/ImageData.h",
   "html/MediaError.h",
@@ -1079,8 +1077,6 @@ sky_core_files = [
   "rendering/RenderTheme.cpp",
   "rendering/RenderTheme.h",
   "rendering/RenderTreeAsText.cpp",
-  "rendering/RenderVideo.cpp",
-  "rendering/RenderVideo.h",
   "rendering/RenderView.cpp",
   "rendering/RootInlineBox.cpp",
   "rendering/ScrollAlignment.cpp",
@@ -1272,7 +1268,6 @@ core_idl_files = get_path_info([
   "html/HTMLStyleElement.idl",
   "html/HTMLTemplateElement.idl",
   "html/HTMLTitleElement.idl",
-  "html/HTMLVideoElement.idl",
   "html/ImageData.idl",
   "html/MediaError.idl",
   "html/MediaKeyError.idl",