Update to Chromium version 95.0.4638.0 (#920003)

Known issues:
- Windows ARM64 builds are currently failing due to
  https://crbug.com/1242884#c31

tests/ceftests/plugin_unittest.cc

@@ -393,7 +393,10 @@ class PluginTestHandler : public RoutingTestHandler,
       got_placeholder_loaded_.yes();
 
       // The plugin placeholder has loaded. Trigger the context menu.
-      TriggerContextMenu(frame->GetBrowser());
+      CefPostDelayedTask(
+          TID_UI,
+          base::BindOnce(&PluginTestHandler::TriggerContextMenu, this, browser),
+          kPdfLoadDelayMs / 5);
     } else if (request == "placeholder_hidden") {
       EXPECT_TRUE(got_placeholder_loaded_);
       EXPECT_FALSE(got_placeholder_hidden_);