WPF - Password gets visible in IME popup for Chinese input

### Is there an existing issue for this?

- [x] I have searched both open/closed issues, no issue already exists.

### CefSharp Version

145.0.260

### Operating System

Windows 11

### Architecture

x64

### .Net Version

framework 4.7.2

### Implementation

WPF

### Reproduction Steps

1. Create a new C# WPF Application for .net Framework 4.7.2
2. Add nuget package for CefSharp 145.0.260
3. Add browser Window to main Window
4. Load any website with a simple password field ()
5. Switch Windows to Chinese input
6. type in any password

### Expected behavior

Password is not displayed on screen

### Actual behavior

Password is visible in IME popup - see screenshot

### Regression?

Also happens with version 140

### Known Workarounds

n/a

### Does this problem also occur in the CEF Sample Application

Yes using WPF/OffScreen command line args

### Other information

Tryed with cef_binary_145.0.28+g51162e8+chromium-145.0.7632.160_windows64_client
Does **also** happen with cmd cefclient.exe --multi-threaded-message-loop --no-sandbox --off-screen-rendering-enabled --enable-gpu
Does **not** happen with cmd cefclient.exe --multi-threaded-message-loop --no-sandbox --use-alloy-style

まず、WPF/OffScreen 構成および --off-screen-rendering-enabled を指定した cefclient.exe で問題を再現し、次に問題が発生しない --use-alloy-style と比較します。影響を受けるレンダリングパスで、パスワード入力が Windows Chinese IME ポップアップにどのように公開されているかを調査します。パスワード入力が引き続き機能しつつ、IME ポップアップにパスワードのテキストが表示されなくなれば完了です。

索引モデルが issue の本文から書いたものです。