Remove most of the media stack.

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 fe57ca7ef2a6517e96839ecd3bce24ef152c8bf7..8bab684116421a176b730edb205bd44034e7c316 100644
--- a/sky/engine/core/core.gni
+++ b/sky/engine/core/core.gni
@@ -758,9 +758,6 @@ sky_core_files = [
   "html/HTMLImageLoader.h",
   "html/HTMLImportElement.cpp",
   "html/HTMLImportElement.h",
-  "html/HTMLMediaElement.cpp",
-  "html/HTMLMediaSource.cpp",
-  "html/HTMLMediaSource.h",
   "html/HTMLPictureElement.cpp",
   "html/HTMLScriptElement.cpp",
   "html/HTMLScriptElement.h",
@@ -776,12 +773,6 @@ sky_core_files = [
   "html/HTMLTitleElement.h",
   "html/ImageData.cpp",
   "html/ImageData.h",
-  "html/MediaError.h",
-  "html/MediaFragmentURIParser.cpp",
-  "html/MediaFragmentURIParser.h",
-  "html/MediaKeyError.h",
-  "html/MediaKeyEvent.cpp",
-  "html/MediaKeyEvent.h",
   "html/PublicURLManager.cpp",
   "html/PublicURLManager.h",
   "html/TextMetrics.h",
@@ -1064,8 +1055,6 @@ sky_core_files = [
   "rendering/RenderLayerStackingNode.cpp",
   "rendering/RenderLayerStackingNodeIterator.cpp",
   "rendering/RenderLineBoxList.cpp",
-  "rendering/RenderMedia.cpp",
-  "rendering/RenderMedia.h",
   "rendering/RenderObject.cpp",
   "rendering/RenderObjectChildList.cpp",
   "rendering/RenderReplaced.cpp",
@@ -1242,7 +1231,6 @@ core_idl_files = get_path_info([
   "html/HTMLElement.idl",
   "html/HTMLImageElement.idl",
   "html/HTMLImportElement.idl",
-  "html/HTMLMediaElement.idl",
   "html/HTMLPictureElement.idl",
   "html/HTMLScriptElement.idl",
   "html/HTMLShadowElement.idl",
@@ -1251,9 +1239,6 @@ core_idl_files = get_path_info([
   "html/HTMLTemplateElement.idl",
   "html/HTMLTitleElement.idl",
   "html/ImageData.idl",
-  "html/MediaError.idl",
-  "html/MediaKeyError.idl",
-  "html/MediaKeyEvent.idl",
   "html/TextMetrics.idl",
   "html/TimeRanges.idl",
   "html/VoidCallback.idl",
@@ -1341,6 +1326,5 @@ core_event_idl_files = get_path_info([
   "events/UIEvent.idl",
   "events/AnimationEvent.idl",
   "events/WheelEvent.idl",
-  "html/MediaKeyEvent.idl",
   "html/canvas/WebGLContextEvent.idl",
 ], "abspath")