Completed the code path from AndroidProviderService to HistoryBackend.

chrome/test/base/testing_profile.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 "chrome/test/base/testing_profile.h"
 
 #include "build/build_config.h"
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
@@ skipping 177 matching lines @@
   if (delegate_) {
     MessageLoop::current()->PostTask(FROM_HERE,
                                      base::Bind(&TestingProfile::FinishInit,
                                                 base::Unretained(this)));
   } else {
     FinishInit();
   }
 }
 
 void TestingProfile::Init() {
+  if (!file_util::PathExists(profile_path_))

[sky, 2012/04/25 15:57:25]

Why is this needed?

[michaelbai, 2012/04/26 05:32:48]

For the profile created by TestingProfileManager::CreateTestingProfile(const
std::string& name), the directory is not created, and
TestingProfile::CreateHistoryService() will fail

On 2012/04/25 15:57:25, sky wrote:

+    file_util::CreateDirectory(profile_path_);
+
   ExtensionSystemFactory::GetInstance()->SetTestingFactory(
       this, TestExtensionSystem::Build);
 
   profile_dependency_manager_->CreateProfileServices(this, true);
 
 #if defined(ENABLE_NOTIFICATIONS)
   // Install profile keyed service factory hooks for dummy/test services
   DesktopNotificationServiceFactory::GetInstance()->SetTestingFactory(
       this, CreateTestDesktopNotificationService);
 #endif
@@ skipping 503 matching lines @@
 void TestingProfile::DestroyWebDataService() {
   if (!web_data_service_.get())
     return;
 
   web_data_service_->Shutdown();
 }
 
 bool TestingProfile::WasCreatedByVersionOrLater(const std::string& version) {
   return true;
 }