cc: Add tile pool to tile manager.

cc/base/ref_counted_managed.h

 // 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.
 
 #ifndef CC_BASE_REF_COUNTED_MANAGED_H_
 #define CC_BASE_REF_COUNTED_MANAGED_H_
 
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
 #include "cc/base/cc_export.h"
@@ skipping 14 matching lines @@
 
  private:
   friend class RefCountedManaged<T>;
   int live_object_count_;
 };
 
 template <typename T>
 class CC_EXPORT RefCountedManaged : public base::subtle::RefCountedBase {
  public:
   explicit RefCountedManaged(RefCountedManager<T>* manager)
-      : manager_(manager) {
-    manager_->live_object_count_++;
+      : manager_(manager),
+        released_(true) {
   }
 
   void AddRef() const {
+    if (released_) {
+      released_ = false;
+      ClearInDtor();
+      manager_->live_object_count_++;
+    }
     base::subtle::RefCountedBase::AddRef();
   }
 
   void Release() {
     if (base::subtle::RefCountedBase::Release()) {
       DCHECK_GT(manager_->live_object_count_, 0);
       manager_->live_object_count_--;
 
+      released_ = true;
+
       // This must be the last statement in case manager deletes
       // the object immediately.
       manager_->Release(static_cast<T*>(this));
     }
   }
 
  protected:
   ~RefCountedManaged() {}
 
  private:
   RefCountedManager<T>* manager_;
+  mutable bool released_;
 
   DISALLOW_COPY_AND_ASSIGN(RefCountedManaged<T>);
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_REF_COUNTED_MANAGED_H_