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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
v8::Local<v8::Value> GetOwnerBrowserWindow(v8::Isolate* isolate) const;
  
  
  void GrantOriginAccess(const GURL& url);
  
  void NotifyUserActivation();
  v8::Local<v8::Promise> TakeHeapSnapshot(v8::Isolate* isolate,
                                          const base::FilePath& file_path);
  
  int32_t ID() const { return id_; }
  v8::Local<v8::Value> Session(v8::Isolate* isolate);
  content::WebContents* HostWebContents() const;
  v8::Local<v8::Value> DevToolsWebContents(v8::Isolate* isolate);
  v8::Local<v8::Value> Debugger(v8::Isolate* isolate);
  content::RenderFrameHost* MainFrame();
  WebContentsZoomController* GetZoomController() { return zoom_controller_; }
  void AddObserver(ExtendedWebContentsObserver* obs) {
    observers_.AddObserver(obs);
  }
  void RemoveObserver(ExtendedWebContentsObserver* obs) {
    
    if (!observers_.empty())
      observers_.RemoveObserver(obs);
  }
  bool EmitNavigationEvent(const std::string& event,
                           content::NavigationHandle* navigation_handle);
  
  template <typename... Args>
  bool EmitWithSender(base::StringPiece name,