cefsimple: Fix sizing of popup windows with --use-views (see issue #2854)

tests/cefsimple/simple_app.cc

@@ -54,6 +54,27 @@ class SimpleWindowDelegate : public CefWindowDelegate {
   DISALLOW_COPY_AND_ASSIGN(SimpleWindowDelegate);
 };
 
+class SimpleBrowserViewDelegate : public CefBrowserViewDelegate {
+ public:
+  SimpleBrowserViewDelegate() {}
+
+  bool OnPopupBrowserViewCreated(CefRefPtr<CefBrowserView> browser_view,
+                                 CefRefPtr<CefBrowserView> popup_browser_view,
+                                 bool is_devtools) OVERRIDE {
+    // Create a new top-level Window for the popup. It will show itself after
+    // creation.
+    CefWindow::CreateTopLevelWindow(
+        new SimpleWindowDelegate(popup_browser_view));
+
+    // We created the Window.
+    return true;
+  }
+
+ private:
+  IMPLEMENT_REFCOUNTING(SimpleBrowserViewDelegate);
+  DISALLOW_COPY_AND_ASSIGN(SimpleBrowserViewDelegate);
+};
+
 }  // namespace
 
 SimpleApp::SimpleApp() {}
@@ -91,7 +112,8 @@ void SimpleApp::OnContextInitialized() {
   if (use_views) {
     // Create the BrowserView.
     CefRefPtr<CefBrowserView> browser_view = CefBrowserView::CreateBrowserView(
-        handler, url, browser_settings, nullptr, nullptr, nullptr);
+        handler, url, browser_settings, nullptr, nullptr,
+        new SimpleBrowserViewDelegate());
 
     // Create the Window. It will show itself after creation.
     CefWindow::CreateTopLevelWindow(new SimpleWindowDelegate(browser_view));