Add additional error logging to investigate Autocomplete Sync failures.

chrome/browser/sync/profile_sync_service_password_unittest.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 <vector>
 
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 128 matching lines @@
   }
 
   void AddPasswordSyncNode(const PasswordForm& entry) {
     sync_api::WriteTransaction trans(FROM_HERE, service_->GetUserShare());
     sync_api::ReadNode password_root(&trans);
     ASSERT_EQ(sync_api::BaseNode::INIT_OK,
               password_root.InitByTagLookup(browser_sync::kPasswordTag));
 
     sync_api::WriteNode node(&trans);
     std::string tag = PasswordModelAssociator::MakeTag(entry);
-    ASSERT_TRUE(node.InitUniqueByCreation(syncable::PASSWORDS,
-                                          password_root,
-                                          tag));
+    sync_api::WriteNode::InitUniqueByCreationResult result =
+        node.InitUniqueByCreation(syncable::PASSWORDS, password_root, tag);
+    ASSERT_EQ(sync_api::WriteNode::INIT_SUCCESS, result);
     PasswordModelAssociator::WriteToSyncNode(entry, &node);
   }
 
  protected:
   ProfileSyncServicePasswordTest() {}
 
   virtual void SetUp() {
     AbstractProfileSyncServiceTest::SetUp();
     profile_.CreateRequestContext();
     password_store_ = static_cast<MockPasswordStore*>(
@@ skipping 427 matching lines @@
   CreateRootHelper create_root(this, syncable::PASSWORDS);
   StartSyncService(create_root.callback(),
                    base::Bind(&AddPasswordEntriesCallback, this, sync_forms));
 
   std::vector<PasswordForm> new_sync_forms;
   GetPasswordEntriesFromSyncDB(&new_sync_forms);
 
   EXPECT_EQ(1U, new_sync_forms.size());
   EXPECT_TRUE(ComparePasswords(expected_forms[0], new_sync_forms[0]));
 }