Show "Update Chrome OS" in the wrench menu, when the update image is ready.

Along the way, replace "About Chrome" with "About Chrome OS" in the wrench menu.

TEST=Connect to a dev server with a newer version, and check that the menu item appears, and the dialog works.

BUG=chromium-os:6526
BUG=chromium-os:7847

Review URL: http://codereview.chromium.org/3858002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@63491 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 082834d..e9088e4 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -3882,6 +3882,8 @@
                 ['include', '^browser/views/toolbar_view.h'],
                 ['include', '^browser/views/unhandled_keyboard_event_handler.cc'],
                 ['include', '^browser/views/unhandled_keyboard_event_handler.h'],
+                ['include', '^browser/views/update_recommended_message_box.h'],
+                ['include', '^browser/views/update_recommended_message_box.cc'],
                 ['include', '^browser/views/view_text_utils.cc'],
                 ['include', '^browser/views/view_text_utils.h'],
                 ['include', '^browser/views/window.cc'],