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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
Emit("close");
  auto* autofill_driver_factory =
      AutofillDriverFactory::FromWebContents(ontents());
  if (autofill_driver_factory) {
    autofill_driver_factory->CloseAllPopups();
  }
  for (ExtendedWebContentsObserver& observer : observers_)
    observer.OnCloseContents();
}
void WebContents::ActivateContents(content::WebContents* source) {
  for (ExtendedWebContentsObserver& observer : observers_)
    observer.OnActivateContents();
}
void WebContents::UpdateTargetURL(content::WebContents* source,
                                  const GURL& url) {
  Emit("update-target-url", url);
}
bool WebContents::HandleKeyboardEvent(
    content::WebContents* source,
    const content::NativeWebKeyboardEvent& event) {
  if (type_ == Type::kWebView && embedder_) {
    
    return embedder_->HandleKeyboardEvent(source, event);
  } else {
    return PlatformHandleKeyboardEvent(source, event);
  }
}
#if !defined(OS_MAC)
bool WebContents::PlatformHandleKeyboardEvent(