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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 DevToolsSearchInPath(int request_id,
                            const std::string& file_system_path,
                            const std::string& query) override;
  
#if defined(TOOLKIT_VIEWS) && !defined(OS_MAC)
  ui::ImageModel GetDevToolsWindowIcon() override;
#endif
#if defined(OS_LINUX)
  void GetDevToolsWindowWMClass(std::string* name,
                                std::string* class_name) override;
#endif
  
  void OnDevToolsIndexingWorkCalculated(int request_id,
                                        const std::string& file_system_path,
                                        int total_work);
  void OnDevToolsIndexingWorked(int request_id,
                                const std::string& file_system_path,
                                int worked);
  void OnDevToolsIndexingDone(int request_id,
                              const std::string& file_system_path);
  void OnDevToolsSearchCompleted(int request_id,
                                 const std::string& file_system_path,
                                 const std::vector<std::string>& file_paths);
  
  void SetHtmlApiFullscreen(bool enter_fullscreen);
  v8::Global<v8::Value> session_;
  v8::Global<v8::Value> devtools_web_contents_;
  v8::Global<v8::Value> debugger_;
  std::unique_ptr<ElectronJavaScriptDialogManager> dialog_manager_;
  std::unique_ptr<WebViewGuestDelegate> guest_delegate_;