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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
bool internal,
    const std::string& channel,
    blink::CloneableMessage arguments,
    electron::mojom::ElectronBrowser::MessageSyncCallback callback,
    content::RenderFrameHost* render_frame_host) {
  TRACE_EVENT1("electron", "WebContents::MessageSync", "channel", channel);
   webContents.emit('-ipc-message-sync', new Event(sender, message), internal,
   channel, arguments);
  EmitWithSender("-ipc-message-sync", render_frame_host, std::move(callback),
                 internal, channel, std::move(arguments));
}
void WebContents::MessageTo(bool internal,
                            int32_t ontents_id,
                            const std::string& channel,
                            blink::CloneableMessage arguments) {
  TRACE_EVENT1("electron", "WebContents::MessageTo", "channel", channel);
  auto* target_ontents = FromID(ontents_id);
  if (target_ontents) {
    content::RenderFrameHost* frame = target_ontents->MainFrame();
    DCHECK(frame);
    v8::HandleScope handle_scope(JavascriptEnvironment::GetIsolate());
    gin::HFrameMain> web_frame_main =
        WebFrameMain::From(JavascriptEnvironment::GetIsolate(), frame);
    int32_t sender_id = ID();
    web_frame_main->GetRendererApi()->Message(internal, channel,
                                              std::move(arguments), sender_id);
  }
}
void WebContents::MessageHost(const std::string& channel,