Remove control character cookie UMA stats.

BUG=238041

Review URL: https://chromiumcodereview.appspot.com/23503084

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224583 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224583
Add deadline scheduling flags and keep disabled by default everywhere

The following command line flags override the default values
for the Renderer on both Android and Aura:
--enable-deadline-scheduling
--disable-deadline-scheduling

The following command line flags override the default values
for the Browser on Aura:
--enable-ui-deadline-scheduling
--disable-ui-deadline-scheduling

BUG=243461

Review URL: https://chromiumcodereview.appspot.com/23587028

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224584 0039d316-1c4b-4281-b951-d872f2087c98
Stub out initial NavigationController browser implementation

This is the initial cut for the browser-side NavigationControllerDispatcherHost,
and all the various related support plumbing to hook up two initial messages.

BUG= 285976

Review URL: https://chromiumcodereview.appspot.com/23615009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224585 0039d316-1c4b-4281-b951-d872f2087c98
Fix DCHECK caused by updating total_memory_usage_ for cloned streams.

BUG=240603

Review URL: https://chromiumcodereview.appspot.com/23726048

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224586 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 224585
SVN changes up to revision 224586