Adding the Copresence RpcHandler and HttpPost helper.

components/copresence.gypi

Index: components/copresence.gypi
diff --git a/components/copresence.gypi b/components/copresence.gypi
index baac59b265749acaecc6471862578d5ddc77db72..04fb88f889db75bc073fee156db8189cb9acc530 100644
--- a/components/copresence.gypi
+++ b/components/copresence.gypi
@@ -1,6 +1,6 @@
 # Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file.
 
 {
   'targets': [
@@ -21,6 +21,7 @@
       'sources': [
         'copresence/copresence_client.cc',
         'copresence/copresence_constants.cc',
+        'copresence/copresence_switches.cc',
         'copresence/handlers/audio/audio_directive_handler.cc',
         'copresence/handlers/audio/audio_directive_handler.h',
         'copresence/handlers/audio/audio_directive_list.cc',
@@ -35,8 +36,10 @@
         'copresence/public/copresence_client.h',
         'copresence/public/copresence_constants.h',
         'copresence/public/whispernet_client.h',
-        'copresence/rpc/rpc_handler.cc'
-        'copresence/rpc/rpc_handler.h'
+        'copresence/rpc/http_post.cc',
+        'copresence/rpc/http_post.h',
+        'copresence/rpc/rpc_handler.cc',
+        'copresence/rpc/rpc_handler.h',
         'copresence/timed_map.h',
       ],
       'export_dependent_settings': [