I've just discovered that this bug doesn't happen when chromium is launched in the maximized state with "Use System Title Bar and Borders" unchecked.
Steps:
1) Unset "Use System Title Bar and Borders"; 2) Maximize Chromium; 3) Close Chromium; 4) Launch Chromium (it will open in the maximized state).
Result: Chromium will not show the double title-bar after maximized+unmaximized.
Tested with Chromium beta (14.0.835.109).
I've just discovered that this bug doesn't happen when chromium is launched in the maximized state with "Use System Title Bar and Borders" unchecked.
Steps:
1) Unset "Use System Title Bar and Borders";
2) Maximize Chromium;
3) Close Chromium;
4) Launch Chromium (it will open in the maximized state).
Result: Chromium will not show the double title-bar after maximized+ unmaximized.
Tested with Chromium beta (14.0.835.109).