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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.h
int32_t web_contents_id,
                 const std::string& channel,
                 blink::CloneableMessage arguments);
  void MessageHost(const std::string& channel,
                   blink::CloneableMessage arguments,
                   content::RenderFrameHost* render_frame_host);
  void UpdateDraggableRegions(std::vector<mojom::DraggableRegionPtr> regions);
  void SetTemporaryZoomLevel(double level);
  void DoGetZoomLevel(
      electron::mojom::ElectronBrowser::DoGetZoomLevelCallback callback);
  void SetImageAnimationPolicy(const std::string& new_policy);
 private:
  
  WebContents(v8::Isolate* isolate, content::WebContents* web_contents);
  
  WebContents(v8::Isolate* isolate,
              std::unique_ptr<content::WebContents> web_contents,
              Type type);
  
  WebContents(v8::Isolate* isolate, const gin_helper::Dictionary& options);
  ~WebContents() override;
  
  
  void InitWithWebContents(content::WebContents* web_contents,
                           ElectronBrowserContext* browser_context,
                           bool is_guest);
  void InitWithSessionAndOptions(
      v8::Isolate* isolate,
      std::unique_ptr<content::WebContents> web_contents,
      gin::Handle<class Session> session,