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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.cc
std::string* class_name) {
  *class_name = Browser::Get()->GetName();
  *name = base::ToLowerASCII(*class_name);
}
#endif
void WebContents::OnDevToolsIndexingWorkCalculated(
    int request_id,
    const std::string& file_system_path,
    int total_work) {
  base::Value request_id_value(request_id);
  base::Value file_system_path_value(file_system_path);
  base::Value total_work_value(total_work);
  inspectable_ontents_->CallClientFunction(
      "DevToolsAPI.indexingTotalWorkCalculated", &request_id_value,
      &file_system_path_value, &total_work_value);
}
void WebContents::OnDevToolsIndexingWorked(int request_id,
                                           const std::string& file_system_path,
                                           int worked) {
  base::Value request_id_value(request_id);
  base::Value file_system_path_value(file_system_path);
  base::Value worked_value(worked);
  inspectable_ontents_->CallClientFunction(
      "DevToolsAPI.indexingWorked", &request_id_value, &file_system_path_value,
      &worked_value);
}
void WebContents::OnDevToolsIndexingDone(int request_id,