### Preflight Checklist

- [X] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
- [X] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
- [X] I have searched the [issue tracker](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

12.0.5

### What operating system are you using?

Ubuntu

### Operating System Version

Ubuntu 21.04 x86_64 5.11.0-16-generic

### What arch are you using?

x64

### Last Known Working Electron version

_No response_

### Expected Behavior

All clicking inside the developer tool works well and not being interrupted by dragging the electron app.

### Actual Behavior

When I click the `option` and `close` tool inside the developer tool, it drags the electron app.

https://user-images.githubusercontent.com/61906684/118137437-666fd600-b42f-11eb-9443-ea1ebad1d0ec.mp4



### Testcase Gist URL

_No response_

### Additional Information

This bug only occurs if the dock position is on the left.
shell/browser/ui/views/inspectable_web_contents_view_views.cc
void DeleteDelegate() override { delete this; }
  views::View* GetInitiallyFocusedView() override { return view_; }
  bool CanMaximize() const override { return true; }
  bool CanMinimize() const override { return true; }
  std::u16string GetWindowTitle() const override { return shell_->GetTitle(); }
  ui::ImageModel GetWindowAppIcon() override { return GetWindowIcon(); }
  ui::ImageModel GetWindowIcon() override { return icon_; }
  views::Widget* GetWidget() override { return widget_; }
  const views::Widget* GetWidget() const override { return widget_; }
  views::View* GetContentsView() override { return view_; }
  views::ClientView* CreateClientView(views::Widget* widget) override {
    return this;
  }
  
  views::CloseRequestResult OnWindowCloseRequested() override {
    shell_->inspectable_web_contents()->CloseDevTools();
    return views::CloseRequestResult::kCannotClose;
  }
 private:
  InspectableWebContentsViewViews* shell_;
  views::View* view_;
  views::Widget* widget_;
  ui::ImageModel icon_;
  DISALLOW_COPY_AND_ASSIGN(DevToolsWindowDelegate);
};
}  
InspectableWebContentsView* CreateInspectableContentsView(