media: Add MediaOzonePlatform support

ui/ozone/ozone_platform.cc

Index: ui/ozone/ozone_platform.cc
diff --git a/ui/ozone/ozone_platform.cc b/ui/ozone/ozone_platform.cc
index e8199b2ce93f86846235f73b8459b9f650859d5f..3edc093c2505f3b68a2a5695f564b3ac9eeefd68 100644
--- a/ui/ozone/ozone_platform.cc
+++ b/ui/ozone/ozone_platform.cc
@@ -5,6 +5,7 @@
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
+#include "content/common/gpu/media/video_decode_factory_ozone.h"
 #include "ui/base/cursor/ozone/cursor_factory_ozone.h"
 #include "ui/events/ozone/event_factory_ozone.h"
 #include "ui/gfx/ozone/surface_factory_ozone.h"
@@ -43,6 +44,7 @@ std::string GetPlatformName() {
 OzonePlatform::OzonePlatform() {}
 
 OzonePlatform::~OzonePlatform() {
+  content::VideoDecodeFactoryOzone::SetInstance(NULL);
   gfx::SurfaceFactoryOzone::SetInstance(NULL);
   ui::EventFactoryOzone::SetInstance(NULL);
   ui::CursorFactoryOzone::SetInstance(NULL);
@@ -60,6 +62,8 @@ void OzonePlatform::Initialize() {
   instance_ = CreatePlatform(platform);
 
   // Inject ozone interfaces.
+  content::VideoDecodeFactoryOzone::SetInstance(
+      instance_->GetVideoDecodeFactoryOzone());
   gfx::SurfaceFactoryOzone::SetInstance(instance_->GetSurfaceFactoryOzone());
   ui::EventFactoryOzone::SetInstance(instance_->GetEventFactoryOzone());
   ui::InputMethodContextFactoryOzone::SetInstance(