Backport SPDY ping changes from chrome 16.

	Bug: 5524112

Backported Chrome 16 changes for SPDY Ping. The Chrome changes
are:
http://codereview.chromium.org/8036016
http://codereview.chromium.org/8230037
http://codereview.chromium.org/8319015
http://codereview.chromium.org/8330002

Also enable the SPDY protocol.

Change-Id: I2c25c19135ec1c75361d51fdbfbbbbb19f0a3098
Signed-off-by: Selim Gurun <sgurun@google.com>
16 files changed