Remove calls to deprecated MessageLoop methods in extensions.

extensions/browser/value_store/value_store_frontend_unittest.cc

 // Copyright 2014 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 "extensions/browser/value_store/value_store_frontend.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
+#include "base/run_loop.h"
 #include "content/public/test/test_browser_thread.h"
 #include "extensions/browser/value_store/test_value_store_factory.h"
 #include "extensions/common/extension_paths.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using content::BrowserThread;
 
 class ValueStoreFrontendTest : public testing::Test {
  public:
   ValueStoreFrontendTest()
       : ui_thread_(BrowserThread::UI, base::MessageLoop::current()),
         file_thread_(BrowserThread::FILE, base::MessageLoop::current()) {
   }
 
   void SetUp() override {
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
 
     base::FilePath test_data_dir;
     ASSERT_TRUE(PathService::Get(extensions::DIR_TEST_DATA, &test_data_dir));
     base::FilePath src_db(test_data_dir.AppendASCII("value_store_db"));
     db_path_ = temp_dir_.path().AppendASCII("temp_db");
     base::CopyDirectory(src_db, db_path_, true);
 
     factory_ = new extensions::TestValueStoreFactory(db_path_);
 
     ResetStorage();
   }
 
   void TearDown() override {
-    base::MessageLoop::current()->RunUntilIdle();  // wait for storage to delete
+    base::RunLoop().RunUntilIdle();  // wait for storage to delete
     storage_.reset();
   }
 
   // Reset the value store, reloading the DB from disk.
   void ResetStorage() {
     storage_.reset(new ValueStoreFrontend(
         factory_, ValueStoreFrontend::BackendType::RULES));
   }
 
   bool Get(const std::string& key, std::unique_ptr<base::Value>* output) {
     storage_->Get(key, base::Bind(&ValueStoreFrontendTest::GetAndWait,
                                   base::Unretained(this), output));
-    base::MessageLoop::current()->Run();  // wait for GetAndWait
+    base::RunLoop().Run();  // wait for GetAndWait
     return !!output->get();
   }
 
  protected:
   void GetAndWait(std::unique_ptr<base::Value>* output,
                   std::unique_ptr<base::Value> result) {
     *output = std::move(result);
     base::MessageLoop::current()->QuitWhenIdle();
   }
 
@@ skipping 46 matching lines @@
 
   {
     ASSERT_TRUE(Get("key1", &value));
     std::string result;
     ASSERT_TRUE(value->GetAsString(&result));
     EXPECT_EQ("new1", result);
   }
 
   ASSERT_FALSE(Get("key2", &value));
 }