[Sync] Display the client server traffic log in about:sync.

sync/test/engine/syncer_command_test.cc

 // Copyright (c) 2012 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 "sync/test/engine/syncer_command_test.h"
 
 namespace browser_sync {
 
+const unsigned int kMaxMessages = 10;
+const unsigned int kMaxMessageSize = 5 * 1024;
 
-SyncerCommandTestBase::SyncerCommandTestBase() {
+SyncerCommandTestBase::SyncerCommandTestBase()
+    : traffic_recorder_(kMaxMessages, kMaxMessageSize) {
 }
 
 SyncerCommandTestBase::~SyncerCommandTestBase() {
 }
 
 void SyncerCommandTestBase::SetUp() {
   ResetContext();
   // The session always expects there to be a passive worker.
   workers()->push_back(
       make_scoped_refptr(new FakeModelWorker(GROUP_PASSIVE)));
@@ skipping 33 matching lines @@
   workers()->push_back(
       make_scoped_refptr(new FakeModelWorker(GROUP_PASSIVE)));
   ResetContext();
 }
 
 Directory* MockDirectorySyncerCommandTest::directory() {
   return &mock_directory_;
 }
 
 }  // namespace browser_sync