Use the same code path for all fullscreen transitions so that Chrome UI updates
correctly. All user-initiated fullscreen transitions now result in
CefWindowDelegate::OnWindowFullscreenTransition callbacks.
These tests expect the window's client area size to be (kWSize, kWSize). Use
::AdjustWindowRect to offset TestWindowDelegate's preferred size so that the
client area size is correct after the OS internally applies frame insets during
::CreateWindow.
To test: Run `ceftests.exe --gtest_filter=ViewsWindowTest.Window*`.
All tests should pass.
Marshall Greenblatt