`CefWindowDelegate::OnKeyEvent` is not triggered

[nik-sp]

Describe the bug

While investigating the failure of ViewsWindowTest.WindowAccelerator, I noticed that the OnKeyEvent function is not triggered. This happens because CefWindowDelegate::OnKeyEvent is not being called as expected.

To Reproduce

I haven't tested on Linux or Windows, but I expect the issue to be reproducible there as well.
It does work on Windows using CefUnhandledKeyEventHandler:

cef/libcef/browser/views/window_impl.cc

Line 59 in a231b7e

class CefUnhandledKeyEventHandler : public ui::EventHandler {

Steps to reproduce the issue:

1. Run the ViewsWindowTest.WindowAccelerator unit test:

./out/Debug_GN_arm64/ceftests.app/Contents/MacOS/ceftests --use-views --enable-chrome-runtime --gtest_filter=ViewsWindowTest.WindowAccelerator

2. Observe that OnKeyEvent is never called.

Alternatively, you can:

1. Run cefclient and set a breakpoint at ViewsWindow::OnKeyEvent:
   

   cef/tests/cefclient/browser/views_window.cc

   Line 908 in a231b7e

   bool ViewsWindow::OnKeyEvent(CefRefPtr<CefWindow> window,

2. Press any key.
3. Notice that OnKeyEvent is not called.

Expected behavior

CefWindowDelegate::OnKeyEvent should be triggered whenever a key is pressed:

cef/include/views/cef_window_delegate.h

Lines 229 to 235 in a231b7e

	///
	/// Called after all other controls in the window have had a chance to
	/// handle the event. |event| contains information about the keyboard event.
	/// Return true if the keyboard event was handled or false otherwise.
	///
	/*--cef()--*/
	virtual bool OnKeyEvent(CefRefPtr<CefWindow> window,

Versions (please complete the following information):

• OS: macOS 14.7
• CEF Version: 129, 130