ObserverList add/remove methods should return a boolean.

BUG=347557

Review URL: https://codereview.chromium.org/182623003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255902 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255902
Rename SigninManagerDelegate to SigninClient

This renaming puts the Signin embedder interface in line with the agreed-upon
convention wherein a component Foo's embedder interface should be named
FooClient. ChromeSigninManagerDelegate is similarly renamed to
ChromeSigninClient, and variable names are updated.

BUG=334168
TBR=joi

Review URL: https://codereview.chromium.org/192253002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255903 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255903
Include the scheme in the key for QUIC the session map.

BUG=350533

Review URL: https://codereview.chromium.org/190063008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@255904 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 255904