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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
void DevToolsReloadPage() override;
  
  void DevToolsFocused() override;
  void DevToolsOpened() override;
  void DevToolsClosed() override;
  void DevToolsResized() override;
  ElectronBrowserContext* GetBrowserContext() const;
  void OnElectronBrowserConnectionError();
#if BUILDFLAG(ENABLE_OSR)
  OffScreenWebContentsView* GetOffScreenWebContentsView() const;
  OffScreenRenderWidgetHostView* GetOffScreenRenderWidgetHostView() const;
#endif
  
  
  void OnGetZoomLevel(content::RenderFrameHost* frame_host,
                      IPC::Message* reply_msg);
  void InitZoomController(content::WebContents* web_contents,
                          const gin_helper::Dictionary& options);
  
  bool CanOverscrollContent() override;
  std::unique_ptr<content::ColorChooser> OpenColorChooser(
      content::WebContents* web_contents,
      SkColor color,
      const std::vector<blink::mojom::ColorSuggestionPtr>& suggestions)
      override;
  std::unique_ptr<content::EyeDropper> OpenEyeDropper(
      content::RenderFrameHost* frame,
      content::EyeDropperListener* listener) override;
  void RunFileChooser(content::RenderFrameHost* render_frame_host,