Add distributable DLLs for MS WebView2

build.py

@@ -1521,6 +1521,10 @@ def copyWxDlls(options):
             cairo_root = os.path.join(phoenixDir(), 'packaging', 'msw-cairo')
             dlls += glob.glob(os.path.join(cairo_root, arch, 'bin', '*.dll'))
 
+        # And the webview2 (MS EDGE) DLL
+        wv2_root = os.path.join(phoenixDir(), 'packaging', 'msw-webview2')
+        dlls += glob.glob(os.path.join(wv2_root, arch, '*.dll'))
+
         # For Python 3.5 and 3.6 builds we also need to copy some VC14 redist DLLs.
         # NOTE: Do it for 3.7+ too for now. But when we fully switch over to VS 2017
         # this may need to change. See notes in wscript about it.

packaging/msw-webview2/README.txt

@@ -0,0 +1,17 @@
+
+msw-webview2
+------------
+
+This folder contains the DLLs used to interface with the Microsoft Edge browser
+and use it as a backend for wx.html2.WebView. The appropriate architecture
+version of the DLL will be copied into the wx package folder at build time.
+
+The original copies of the DLLs can be found in the WebView2 SDK nuget:
+
+    https://www.nuget.org/packages/Microsoft.Web.WebView2
+
+
+The current version of Microsoft.Web.WebView2 being used here is 0.9.622.11.
+Note that it may be necessary to have the Beta Channel version of Microsoft Edge
+installed for this to work.
+