Added BackgroundContentsService to manage lifecycle of BackgroundContents.
If --restore-background-contents flag is passed, stores the URLs of running
BackgroundContents in preferences so they can be re-launched when the browser
restarts.
Moved logic to shutdown background contents into BackgroundContentsService so
we can use this to coordinate when to keep the browser process running.
BUG=43382
TEST=new tests
Review URL: http://codereview.chromium.org/2104018
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@50329 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 291f5dc..a5f6a245 100755
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -221,6 +221,8 @@
'browser/automation/ui_controls.h',
'browser/back_forward_menu_model.cc',
'browser/back_forward_menu_model.h',
+ 'browser/background_contents_service.h',
+ 'browser/background_contents_service.cc',
'browser/blocked_popup_container.cc',
'browser/blocked_popup_container.h',
'browser/bookmarks/bookmark_codec.cc',
