Remove ash::ScopedObserverWithDuplicatedSources

ash/shelf/scoped_observer_with_duplicated_sources_unittest.cc

-// Copyright 2013 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 "ash/shelf/scoped_observer_with_duplicated_sources.h"
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-class TestObserver {
- public:
-  TestObserver() {}
-  ~TestObserver() {}
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(TestObserver);
-};
-
-class TestSource {
- public:
-  TestSource() : observer_count_(0) {}
-  ~TestSource() {}
-
-  void AddObserver(TestObserver* observer) { observer_count_++; }
-  void RemoveObserver(TestObserver* observer) { observer_count_--; }
-
-  int GetObserverCount() { return observer_count_; }
-
- private:
-  int observer_count_;
-
-  DISALLOW_COPY_AND_ASSIGN(TestSource);
-};
-
-TEST(ScopedObserverWithDuplicatedSourcesTest, DuplicatedSource) {
-  TestObserver observer;
-  TestSource source1;
-  TestSource source2;
-
-  ScopedObserverWithDuplicatedSources<TestSource, TestObserver> observers(
-      &observer);
-  EXPECT_EQ(0, source1.GetObserverCount());
-  EXPECT_FALSE(observers.IsObserving(&source1));
-  EXPECT_EQ(0, source2.GetObserverCount());
-  EXPECT_FALSE(observers.IsObserving(&source2));
-
-  // Add |source1|.
-  observers.Add(&source1);
-  EXPECT_EQ(1, source1.GetObserverCount());
-  EXPECT_TRUE(observers.IsObserving(&source1));
-  // AddObserver of TestSource is called only once.
-  observers.Add(&source1);
-  EXPECT_EQ(1, source1.GetObserverCount());
-  EXPECT_TRUE(observers.IsObserving(&source1));
-
-  // Add |source2|.
-  observers.Add(&source2);
-  EXPECT_EQ(1, source2.GetObserverCount());
-  EXPECT_TRUE(observers.IsObserving(&source2));
-
-  // Remove |source1|.
-  observers.Remove(&source1);
-  EXPECT_EQ(1, source1.GetObserverCount());
-  EXPECT_TRUE(observers.IsObserving(&source1));
-
-  // Remove |source2|.
-  observers.Remove(&source2);
-  EXPECT_EQ(0, source2.GetObserverCount());
-  EXPECT_FALSE(observers.IsObserving(&source2));
-
-  // Remove |source1| again.
-  observers.Remove(&source1);
-  // In this time, |observer| is removed from |source1|.
-  EXPECT_EQ(0, source1.GetObserverCount());
-  EXPECT_FALSE(observers.IsObserving(&source1));
-}