Clean up ScopedVectorTest's LifeCycleObject.

The scoped_ptr<LifeCycleObject> was unncessary and confusing. The LifeCycleWatcher safely owns its LifeCycleObject and deletes it. The scoped_ptr made things a bit confusing even, since the only reason we weren't getting a double delete was because the scoped_ptr had an (ever so) slightly narrower scope than watcher.

Making the LifeCycleObject mostly private should encourage future callers not to add scary aliases. 

R=willchan@chromium.org
BUG=None


Review URL: https://chromiumcodereview.appspot.com/11416166

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@171058 0039d316-1c4b-4281-b951-d872f2087c98

base/memory/scoped_vector_unittest.cc

@@ -23,16 +23,18 @@ class LifeCycleObject {
     virtual ~Observer() {}
   };
 
-  explicit LifeCycleObject(Observer* observer)
-      : observer_(observer) {
-    observer_->OnLifeCycleConstruct(this);
-  }
-
   ~LifeCycleObject() {
     observer_->OnLifeCycleDestroy(this);
   }
 
  private:
+  friend class LifeCycleWatcher;
+
+  explicit LifeCycleObject(Observer* observer)
+      : observer_(observer) {
+    observer_->OnLifeCycleConstruct(this);
+  }
+
   Observer* observer_;
 
   DISALLOW_COPY_AND_ASSIGN(LifeCycleObject);
@@ -115,19 +117,18 @@ TEST(ScopedVectorTest, Clear) {
   EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
   scoped_vector.clear();
   EXPECT_EQ(LC_DESTROYED, watcher.life_cycle_state());
-  EXPECT_EQ(static_cast<size_t>(0), scoped_vector.size());
+  EXPECT_TRUE(scoped_vector.empty());
 }
 
 TEST(ScopedVectorTest, WeakClear) {
   LifeCycleWatcher watcher;
   EXPECT_EQ(LC_INITIAL, watcher.life_cycle_state());
   ScopedVector<LifeCycleObject> scoped_vector;
-  scoped_ptr<LifeCycleObject> object(watcher.NewLifeCycleObject());
-  scoped_vector.push_back(object.get());
+  scoped_vector.push_back(watcher.NewLifeCycleObject());
   EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
   scoped_vector.weak_clear();
   EXPECT_EQ(LC_CONSTRUCTED, watcher.life_cycle_state());
-  EXPECT_EQ(static_cast<size_t>(0), scoped_vector.size());
+  EXPECT_TRUE(scoped_vector.empty());
 }
 
 TEST(ScopedVectorTest, ResizeShrink) {