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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/ui/inspectable_web_contents.cc
bool discover_usb_devices,
    bool port_forwarding_enabled,
    const std::string& port_forwarding_config,
    bool network_discovery_enabled,
    const std::string& network_discovery_config) {}
void InspectableWebContents::SetDevicesUpdatesEnabled(bool enabled) {}
void InspectableWebContents::PerformActionOnRemotePage(
    const std::string& page_id,
    const std::string& action) {}
void InspectableWebContents::OpenRemotePage(const std::string& browser_id,
                                            const std::string& url) {}
void InspectableWebContents::OpenNodeFrontend() {}
void InspectableWebContents::DispatchProtocolMessageFromDevToolsFrontend(
    const std::string& message) {
  
  
  if (base::MatchPattern(message,
                         "{\"id\":*,"
                         "\"method\":\"Page.reload\","
                         "\"params\":*}")) {
    if (delegate_)
      delegate_->DevToolsReloadPage();
    return;
  }
  if (agent_host_)
    agent_host_->DispatchProtocolMessage(
        this, base::as_bytes(base::make_span(message)));
}
void InspectableWebContents::SendJsonRequest(DispatchCallback callback,