Added example extension for the managed storage namespace, that manages Chrome's bookmarks via a policy.

BUG=108992
TEST=None

Review URL: https://codereview.chromium.org/10817029

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239402 0039d316-1c4b-4281-b951-d872f2087c98
Enable the task manager to be put into immersive fullscreen

BUG=307622
TEST=AcceleratorCommandsBrowserTest.ToggleFullscreen
Manual
1) Enable "Enable immersive fullscreen for non browser windows" in chrome://flags
2) Open the task manager
3) With the task manager having focus, hit <F4>. Check that the window goes fullscreen
4) Hover the mouse at the top of the screen. Check that the window controls slide onscreen
5) Hit <F4> again. Check that the window exits fullscreen.

Review URL: https://codereview.chromium.org/84743003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239403 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239402
Add gdb.printing import in gdb chrome python file for issue 226278 (gdb
module doesn't exit)

BUG=226278

Review URL: https://codereview.chromium.org/91483002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@239404 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 239404