Electron Implementation BrowerWindow setAspectRatio Function on Windows os

Electron Browser Window setAspectratio is implemented on Windows OS

• I am trying to merge this feature to current electron master branch

1. Problem
   • setAspectratio works on only MacOS

   const electron = require('electron');
   const curWindow = electron.remote.getCurrentWindow();
   curWindow.setAspectRatio(4/5);
   

   Mac OS Provide API to keep window size ratio, but Window OS do not have like that API

2. Solution
   • implement keeping width-height ratio function on Window OS
   • using WM_SIZE or WM_SIZING window Event

   void NativeWindowViews::HandleSizingEvent(WPARAM w_param, LPARAM l_param) {
   double aspect_ratio = GetAspectRatio();
   // aspect_ratio width/height
   if (aspect_ratio == 0) {
       return;
   }
   RECT* window_rect;
   window_rect = reinterpret_cast<RECT*>(l_param);
   int width = window_rect->right - window_rect->left;
   int height = window_rect->bottom - window_rect->top;
   
   double result_width = 0;
   double result_height = 0;
   
   switch ((UINT)w_param) {
       case WMSZ_LEFT:
       case WMSZ_RIGHT:
       result_width = width;
       result_height = static_cast<double>(width) / aspect_ratio;
       break;
       case WMSZ_TOP:
       case WMSZ_BOTTOM:
       result_width = static_cast<double>(height) * aspect_ratio;
       result_height = height;
       break;
       case WMSZ_TOPLEFT:
       case WMSZ_TOPRIGHT:
       case WMSZ_BOTTOMLEFT:
       case WMSZ_BOTTOMRIGHT:
       result_width = static_cast<double>(height) * aspect_ratio;
       result_height = height;
       break;
       default:
       break;
   }
   gfx::Size ratio_fit_size(result_width, result_height);
   gfx::Size min_fit_size = GetMinimumSize();
   if (min_fit_size.width() >= result_width ||
       min_fit_size.height() >= result_height) {
       return;
   } else {
       // SetSize(ratio_fit_size, false);
       window_rect->right = window_rect->left + result_width;
       window_rect->bottom = window_rect->top + result_height;
   }
       }