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### Issue Details

* **Electron Version:**
  * 8.0.0-beta.5
* **Operating System:**
  * Windows 10
* **Last Known Working Electron version:**
  * 8.0.0-beta.4

### Expected Behavior
https://youtube.com should load.

### Actual Behavior
https://youtube.com is not loading.

### To Reproduce
https://gist.github.com/e9ea437d3562b951a6619540aaf3da15

### Screenshots
![image](https://user-images.githubusercontent.com/11065386/71311012-519a3900-241b-11ea-90b5-2eb959bc74ea.png)

### Additional information

This may be related to #21242 
shell/browser/feature_list.cc
#include "electron/shell/browser/feature_list.h"
#include <string>
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "content/public/common/content_features.h"
#include "electron/buildflags/buildflags.h"
#include "media/base/media_switches.h"
namespace electron {
void InitializeFeatureList() {
  auto* cmd_line = base::CommandLine::ForCurrentProcess();
  auto enable_features =
      cmd_line->GetSwitchValueASCII(::switches::kEnableFeatures);
  auto disable_features =
      cmd_line->GetSwitchValueASCII(::switches::kDisableFeatures);
  
  
  
  
  disable_features +=
      std::string(",") + features::kSpareRendererForSitePerProcess.name;
#if !BUILDFLAG(ENABLE_PICTURE_IN_PICTURE)
  disable_features += std::string(",") + media::kPictureInPicture.name;
#endif
  base::FeatureList::InitializeInstance(enable_features, disable_features);
}
}