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### Issue Details
Electron Version: All Version
Operating System: macOS 10.15.3
Last Known Working Electron version: Never

### Bug
The color picker in devtools does not work.
In devtools if you want to change the colors of the CSS code. When you click on a color a color picker is supposed to appear but it does not appear.

### Screenshots
<img width="1013" alt="Capture d’écran 2020-09-07 à 11 42 44" src="https://user-images.githubusercontent.com/70572698/92374841-988ea280-f100-11ea-96be-afc93f6dd645.png">

shell/browser/api/electron_api_web_contents.cc
ontents()->NotifyPreferencesChanged();
  WebContentsPermissionHelper::CreateForWebContents(ontents());
  InitZoomController(ontents(), options);
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
  extensions::ElectronExtensionWebContentsObserver::CreateForWebContents(
      ontents());
  script_executor_ =
      std::make_unique<extensions::ScriptExecutor>(ontents());
#endif
  AutofillDriverFactory::CreateForWebContents(ontents());
  ontents()->SetUserAgentOverride(blink::UserAgentOverride::UserAgentOnly(
                                           GetBrowserContext()->GetUserAgent()),
                                       false);
  if (IsGuest()) {
    NativeWindow* owner_window = nullptr;
    if (embedder_) {
      
      auto* relay =
          NativeWindowRelay::FromWebContents(embedder_->ontents());
      if (relay)
        owner_window = relay->GetNativeWindow();
    }
    if (owner_window)
      SetOwnerWindow(owner_window);
  }
  ontents()->SetUserData(kElectronApiWebContentsKey,
                              std::make_unique<UserDataLink>(GetWeakPtr()));
}
#if BUILDFLAG(ENABLE_ELECTRON_EXTENSIONS)
void WebContents::InitWithExtensionView(v8::Isolate* isolate,