[GCM] Add more UMA to GCM

google_apis/gcm/gcm_client.cc

 // Copyright 2013 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.
 
 #include "google_apis/gcm/gcm_client.h"
 
 namespace gcm {
 
 GCMClient::OutgoingMessage::OutgoingMessage()
-    : time_to_live(0) {
+    : time_to_live(kMaximumTTL) {
 }
 
 GCMClient::OutgoingMessage::~OutgoingMessage() {
 }
 
 GCMClient::IncomingMessage::IncomingMessage() {
 }
 
 GCMClient::IncomingMessage::~IncomingMessage() {
 }
@@ skipping 14 matching lines @@
 GCMClient::GCMStatistics::~GCMStatistics() {
 }
 
 GCMClient::GCMClient() {
 }
 
 GCMClient::~GCMClient() {
 }
 
 }  // namespace gcm