Revert of media: Add MediaOzonePlatform support

content/common/gpu/media/gpu_video_decode_accelerator.cc

Index: content/common/gpu/media/gpu_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/gpu_video_decode_accelerator.cc b/content/common/gpu/media/gpu_video_decode_accelerator.cc
index ddd5ebe6570cac2a015e5c2966e95d4910b50c9e..0d94eaa2d80876ff37f0460af66f1350eeb2a575 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.cc
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.cc
@@ -33,8 +33,6 @@
 #include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
 #include "ui/gl/gl_context_glx.h"
 #include "ui/gl/gl_implementation.h"
-#elif defined(USE_OZONE)
-#include "media/ozone/media_ozone_platform.h"
 #elif defined(OS_ANDROID)
 #include "content/common/gpu/media/android_video_decode_accelerator.h"
 #endif
@@ -277,15 +275,6 @@
       static_cast<gfx::GLContextGLX*>(stub_->decoder()->GetGLContext());
   video_decode_accelerator_.reset(new VaapiVideoDecodeAccelerator(
       glx_context->display(), make_context_current_));
-#elif defined(USE_OZONE)
-  media::MediaOzonePlatform* platform =
-      media::MediaOzonePlatform::GetInstance();
-  video_decode_accelerator_.reset(platform->CreateVideoDecodeAccelerator(
-      make_context_current_));
-  if (!video_decode_accelerator_) {
-    SendCreateDecoderReply(init_done_msg, false);
-    return;
-  }
 #elif defined(OS_ANDROID)
   video_decode_accelerator_.reset(new AndroidVideoDecodeAccelerator(
       stub_->decoder()->AsWeakPtr(),