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### Preflight Checklist
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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
}
namespace gin {
class Arguments;
}
namespace electron {
class ElectronBrowserContext;
class ElectronJavaScriptDialogManager;
class InspectableWebContents;
class WebContentsZoomController;
class WebViewGuestDelegate;
class FrameSubscriber;
class WebDialogHelper;
class NativeWindow;
#if BUILDFLAG(ENABLE_OSR)
class OffScreenRenderWidgetHostView;
class OffScreenWebContentsView;
#endif
namespace api {
class WebContents : public gin::Wrappable<WebContents>,
                    public gin_helper::EventEmitterMixin<WebContents>,
                    public gin_helper::Constructible<WebContents>,
                    public gin_helper::CleanedUpAtExit,
                    public content::WebContentsObserver,
                    public content::WebContentsDelegate,
                    public InspectableWebContentsDelegate,
                    public InspectableWebContentsViewDelegate {
 public:
  enum class Type {