sync: Use base::MessageLoop.

sync/syncable/syncable_unittest.cc

Index: sync/syncable/syncable_unittest.cc
diff --git a/sync/syncable/syncable_unittest.cc b/sync/syncable/syncable_unittest.cc
index e5562aa9f9d51c3fcbac56ee817d9ee2bb6abef3..ec8512bdf6d9959a2cc357f04beb1f0b7a0f20a9 100644
--- a/sync/syncable/syncable_unittest.cc
+++ b/sync/syncable/syncable_unittest.cc
@@ -97,7 +97,7 @@ class SyncableGeneralTest : public testing::Test {
   virtual void TearDown() {
   }
  protected:
-  MessageLoop message_loop_;
+  base::MessageLoop message_loop_;
   base::ScopedTempDir temp_dir_;
   NullDirectoryChangeDelegate delegate_;
   FakeEncryptor encryptor_;
@@ -446,7 +446,7 @@ TEST_F(SyncableGeneralTest, BookmarkTagTest) {
 // the unit tests fast.
 class SyncableDirectoryTest : public testing::Test {
  protected:
-  MessageLoop message_loop_;
+  base::MessageLoop message_loop_;
   static const char kName[];
 
   virtual void SetUp() {
@@ -2103,7 +2103,7 @@ class SyncableDirectoryManagement : public testing::Test {
   virtual void TearDown() {
   }
  protected:
-  MessageLoop message_loop_;
+  base::MessageLoop message_loop_;
   base::ScopedTempDir temp_dir_;
   FakeEncryptor encryptor_;
   TestUnrecoverableErrorHandler handler_;
@@ -2172,7 +2172,7 @@ class StressTransactionsDelegate : public base::PlatformThread::Delegate {
 };
 
 TEST(SyncableDirectory, StressTransactions) {
-  MessageLoop message_loop;
+  base::MessageLoop message_loop;
   base::ScopedTempDir temp_dir;
   ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
   FakeEncryptor encryptor;