restore browserView webcontents type

lib/browser/api/browser-view.ts

@@ -15,6 +15,7 @@ export default class BrowserView {
     if (webContents) {
       v8Util.setHiddenValue(webPreferences, 'webContents', webContents);
     }
+    webPreferences.type = 'browserView';
     this.#webContentsView = new WebContentsView(webPreferences);
   }
 

shell/browser/api/electron_api_web_contents.cc

@@ -322,6 +322,9 @@ struct Converter<electron::api::WebContents::Type> {
       case Type::kBrowserWindow:
         type = "window";
         break;
+      case Type::kBrowserView:
+        type = "browserView";
+        break;
       case Type::kRemote:
         type = "remote";
         break;
@@ -346,6 +349,8 @@ struct Converter<electron::api::WebContents::Type> {
       return false;
     if (type == "backgroundPage") {
       *out = Type::kBackgroundPage;
+    } else if (type == "browserView") {
+      *out = Type::kBrowserView;
     } else if (type == "webview") {
       *out = Type::kWebView;
 #if BUILDFLAG(ENABLE_OSR)

shell/browser/api/electron_api_web_contents.h

@@ -115,6 +115,9 @@ class WebContents : public ExclusiveAccessContext,
   enum class Type {
     kBackgroundPage,  // An extension background page.
     kBrowserWindow,   // Used by BrowserWindow.
+    kBrowserView,     // Used by the JS implementation of BrowserView for
+                      // backwards compatibility. Otherwise identical to
+                      // kBrowserWindow.
     kRemote,          // Thin wrap around an existing WebContents.
     kWebView,         // Used by <webview>.
     kOffScreen,       // Used for offscreen rendering

spec/api-browser-view-spec.ts

@@ -50,6 +50,11 @@ describe('BrowserView module', () => {
     expect(view.webContents.getURL()).to.equal('about:blank');
   });
 
+  it('has type browserView', () => {
+    view = new BrowserView();
+    expect(view.webContents.getType()).to.equal('browserView');
+  });
+
   describe('BrowserView.setBackgroundColor()', () => {
     it('does not throw for valid args', () => {
       view = new BrowserView();

typings/internal-electron.d.ts

@@ -105,7 +105,7 @@ declare namespace Electron {
   interface WebPreferences {
     disablePopups?: boolean;
     embedder?: Electron.WebContents;
-    type?: 'backgroundPage' | 'window' | 'remote' | 'webview' | 'offscreen';
+    type?: 'backgroundPage' | 'window' | 'browserView' | 'remote' | 'webview' | 'offscreen';
   }
 
   interface Menu {