Re-land http://codereview.chromium.org/7831056/ and http://codereview.chromium.org/7833042/ .

chrome/browser/net/sqlite_persistent_cookie_store_unittest.cc

 // Copyright (c) 2011 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 "base/bind.h"
 #include "base/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop.h"
 #include "base/scoped_temp_dir.h"
 #include "base/stl_util.h"
+#include "base/synchronization/waitable_event.h"
 #include "base/test/thread_test_helper.h"
 #include "base/time.h"
 #include "chrome/browser/net/sqlite_persistent_cookie_store.h"
 #include "chrome/common/chrome_constants.h"
 #include "content/browser/browser_thread.h"
 #include "googleurl/src/gurl.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class SQLitePersistentCookieStoreTest : public testing::Test {
  public:
   SQLitePersistentCookieStoreTest()
       : ui_thread_(BrowserThread::UI),
-        db_thread_(BrowserThread::DB) {
+        db_thread_(BrowserThread::DB),
+        io_thread_(BrowserThread::IO),
+        event_(false, false) {
   }
 
  protected:
+  void OnLoaded(
+      const std::vector<net::CookieMonster::CanonicalCookie*>& cookies) {
+    cookies_ = cookies;
+    event_.Signal();
+  }
+
+  bool Load(std::vector<net::CookieMonster::CanonicalCookie*>* cookies) {
+    bool result =
+        store_->Load(base::Bind(&SQLitePersistentCookieStoreTest::OnLoaded,
+                                base::Unretained(this)));
+    event_.Wait();
+    *cookies = cookies_;
+    return result;
+  }
+
   virtual void SetUp() {
     ui_thread_.Start();
     db_thread_.Start();
+    io_thread_.Start();
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
     store_ = new SQLitePersistentCookieStore(
         temp_dir_.path().Append(chrome::kCookieFilename));
     std::vector<net::CookieMonster::CanonicalCookie*> cookies;
-    ASSERT_TRUE(store_->Load(&cookies));
-    ASSERT_TRUE(0 == cookies.size());
+    ASSERT_TRUE(Load(&cookies));
+    ASSERT_EQ(0u, cookies.size());
     // Make sure the store gets written at least once.
     store_->AddCookie(
         net::CookieMonster::CanonicalCookie(GURL(), "A", "B", "http://foo.bar",
                                             "/", std::string(), std::string(),
                                             base::Time::Now(),
                                             base::Time::Now(),
                                             base::Time::Now(),
                                             false, false, true));
   }
 
   BrowserThread ui_thread_;
   BrowserThread db_thread_;
+  BrowserThread io_thread_;
+  base::WaitableEvent event_;
+  std::vector<net::CookieMonster::CanonicalCookie*> cookies_;
   ScopedTempDir temp_dir_;
   scoped_refptr<SQLitePersistentCookieStore> store_;
 };
 
 TEST_F(SQLitePersistentCookieStoreTest, KeepOnDestruction) {
   store_->SetClearLocalStateOnExit(false);
   store_ = NULL;
   // Make sure we wait until the destructor has run.
   scoped_refptr<base::ThreadTestHelper> helper(
       new base::ThreadTestHelper(
@@ skipping 31 matching lines @@
   store_ = NULL;
   scoped_refptr<base::ThreadTestHelper> helper(
       new base::ThreadTestHelper(
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::DB)));
   // Make sure we wait until the destructor has run.
   ASSERT_TRUE(helper->Run());
   store_ = new SQLitePersistentCookieStore(
       temp_dir_.path().Append(chrome::kCookieFilename));
 
   // Reload and test for persistence
-  ASSERT_TRUE(store_->Load(&cookies));
+  ASSERT_TRUE(Load(&cookies));
   ASSERT_EQ(1U, cookies.size());
   ASSERT_STREQ("http://foo.bar", cookies[0]->Domain().c_str());
   ASSERT_STREQ("A", cookies[0]->Name().c_str());
   ASSERT_STREQ("B", cookies[0]->Value().c_str());
 
   // Now delete the cookie and check persistence again.
   store_->DeleteCookie(*cookies[0]);
   store_ = NULL;
   // Make sure we wait until the destructor has run.
   ASSERT_TRUE(helper->Run());
   STLDeleteContainerPointers(cookies.begin(), cookies.end());
   cookies.clear();
   store_ = new SQLitePersistentCookieStore(
       temp_dir_.path().Append(chrome::kCookieFilename));
 
   // Reload and check if the cookie has been removed.
-  ASSERT_TRUE(store_->Load(&cookies));
+  ASSERT_TRUE(Load(&cookies));
   ASSERT_EQ(0U, cookies.size());
 }
 
 // Test that we can force the database to be written by calling Flush().
 TEST_F(SQLitePersistentCookieStoreTest, TestFlush) {
   // File timestamps don't work well on all platforms, so we'll determine
   // whether the DB file has been modified by checking its size.
   FilePath path = temp_dir_.path().Append(chrome::kCookieFilename);
   base::PlatformFileInfo info;
   ASSERT_TRUE(file_util::GetFileInfo(path, &info));
@@ skipping 52 matching lines @@
 
   store_->Flush(NewRunnableMethod(counter.get(), &CallbackCounter::Callback));
 
   scoped_refptr<base::ThreadTestHelper> helper(
       new base::ThreadTestHelper(
           BrowserThread::GetMessageLoopProxyForThread(BrowserThread::DB)));
   ASSERT_TRUE(helper->Run());
 
   ASSERT_EQ(1, counter->callback_count());
 }