P2P Sockets host implementation.

Currently only UDP sockets on Mac and Linux are supported. Also added
--enable-p2papi flag. The flags just enables IPC for P2P.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/6598053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76604 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index d06ed4d7..54f5e55 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -254,6 +254,13 @@
     kOsAll,
     SINGLE_VALUE_TYPE(switches::kEnableHistoryQuickProvider)
   },
+  {
+    "p2papi",
+    IDS_FLAGS_P2P_API_NAME,
+    IDS_FLAGS_P2P_API_DESCRIPTION,
+    kOsAll,
+    SINGLE_VALUE_TYPE(switches::kEnableP2PApi)
+  },
 };
 
 const Experiment* experiments = kExperiments;