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### Issue Details

* **Electron Version:**
  * 6.0.6, 6.0.12
* **Operating System:**
  * Microsoft Windows [Version 10.0.18362.418]
* **Last Known Working Electron version:**
  * 6.0.5

### Expected Behavior
minHeight/minWidth is the same value on all monitors

### Actual Behavior
minHeight/minWidth are much larger in size on lower DPI monitors

### To Reproduce
Sample app: https://github.com/ToadKing/dpi-bug

To reproduce, you must have multiple monitors on Windows with different DPI levels. The primary monitor on your desktop should be a high DPI one, while a secondary monitor should be lower DPI.

### Screenshots
High DPI primary monitor:
![image](https://user-images.githubusercontent.com/1023440/66600023-3765f400-eb6a-11e9-9af8-565ad652012f.png)

Lower DPI secondary monitor (stretches off the monitor):
![image](https://user-images.githubusercontent.com/1023440/66600069-4e0c4b00-eb6a-11e9-97f6-c4fc13c57e7b.png)


### Additional Information
The behavior works in 6.0.5, but is broken in 6.0.6. Might be #19928/#20001 or the Chromium upgrade?

shell/browser/native_window_views_win.cc
if (forward && !forwarding_mouse_messages_) {
    forwarding_mouse_messages_ = true;
    forwarding_windows_.insert(this);
    
    
    SetWindowSubclass(legacy_window_, SubclassProc, 1,
                      reinterpret_cast<DWORD_PTR>(this));
    if (!mouse_hook_) {
      mouse_hook_ = SetWindowsHookEx(WH_MOUSE_LL, MouseHookProc, NULL, 0);
    }
  } else if (!forward && forwarding_mouse_messages_) {
    forwarding_mouse_messages_ = false;
    forwarding_windows_.erase(this);
    RemoveWindowSubclass(legacy_window_, SubclassProc, 1);
    if (forwarding_windows_.size() == 0) {
      UnhookWindowsHookEx(mouse_hook_);
      mouse_hook_ = NULL;
    }
  }
}
LRESULT CALLBACK NativeWindowViews::SubclassProc(HWND hwnd,