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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
std::unique_ptr<WebDialogHelper> web_dialog_helper_;
  scoped_refptr<DevToolsFileSystemIndexer> devtools_file_system_indexer_;
  ElectronBrowserContext* browser_context_;
  
  
  
  
  std::unique_ptr<InspectableWebContents> inspectable_web_contents_;
  
  typedef std::map<std::string, base::FilePath> PathsMap;
  PathsMap saved_files_;
  
  typedef std::
      map<int, scoped_refptr<DevToolsFileSystemIndexer::FileSystemIndexingJob>>
          DevToolsIndexingJobsMap;
  DevToolsIndexingJobsMap devtools_indexing_jobs_;
  scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
#if BUILDFLAG(ENABLE_PRINTING)
  scoped_refptr<base::TaskRunner> print_task_runner_;
#endif
  
  content::RenderFrameHost* fullscreen_frame_ = nullptr;
  service_manager::BinderRegistryWithArgs<content::RenderFrameHost*> registry_;
  base::WeakPtrFactory<WebContents> weak_factory_{this};
  DISALLOW_COPY_AND_ASSIGN(WebContents);
};
}  
}  
#endif