cc: The recent texture manager bug uncovered some unnecessary code

cc/prioritized_texture.h

 // Copyright 2012 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 CCPrioritizedTexture_h
 #define CCPrioritizedTexture_h
 
 #include "IntRect.h"
 #include "IntSize.h"
 #include "base/basictypes.h"
@@ skipping 65 matching lines @@
     ResourceProvider::ResourceId resourceId() const;
 
     // Self-managed textures are accounted for when prioritizing other textures,
     // but they are not allocated/recycled/deleted, so this needs to be done
     // externally. canAcquireBackingTexture() indicates if the texture would have
     // been allowed given its priority.
     void setIsSelfManaged(bool isSelfManaged) { m_isSelfManaged = isSelfManaged; }
     bool isSelfManaged() { return m_isSelfManaged; }
     void setToSelfManagedMemoryPlaceholder(size_t bytes);
 
+    void returnBackingTexture();
+
 private:
     friend class PrioritizedTextureManager;
     friend class PrioritizedTextureTest;
 
     class Backing : public Texture {
     public:
         Backing(unsigned id, ResourceProvider*, IntSize, GLenum format);
         ~Backing();
         void updatePriority();
         void updateInDrawingImplTree();
@@ skipping 45 matching lines @@
 
     Backing* m_backing;
     PrioritizedTextureManager* m_manager;
 
     DISALLOW_COPY_AND_ASSIGN(PrioritizedTexture);
 };
 
 }  // namespace cc
 
 #endif