Simplify BackgroundImageGeometry by removing meaningless distinctions.

Source/core/paint/BackgroundImageGeometry.h

 // 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.
 
 #ifndef BackgroundImageGeometry_h
 #define BackgroundImageGeometry_h
 
 #include "platform/geometry/IntPoint.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/geometry/IntSize.h"
 
 namespace blink {
 
 class BackgroundImageGeometry {
 public:
     BackgroundImageGeometry()
         : m_hasNonLocalGeometry(false)
     { }
 
-    IntPoint destOrigin() const { return m_destOrigin; }
-    void setDestOrigin(const IntPoint& destOrigin)
-    {
-        m_destOrigin = destOrigin;
-    }
-
     IntRect destRect() const { return m_destRect; }
     void setDestRect(const IntRect& destRect)
     {
         m_destRect = destRect;
     }
 
-    // Returns the phase relative to the destination rectangle.
-    IntPoint relativePhase() const;
-
     IntPoint phase() const { return m_phase; }
     void setPhase(const IntPoint& phase)
     {
         m_phase = phase;
     }
 
     IntSize tileSize() const { return m_tileSize; }
     void setTileSize(const IntSize& tileSize)
     {
         m_tileSize = tileSize;
@@ skipping 15 matching lines @@
 
     void useFixedAttachment(const IntPoint& attachmentPoint);
 
     void clip(const IntRect&);
 
     void setHasNonLocalGeometry(bool hasNonLocalGeometry = true) { m_hasNonLocalGeometry = hasNonLocalGeometry; }
     bool hasNonLocalGeometry() const { return m_hasNonLocalGeometry; }
 
 private:
     IntRect m_destRect;
-    IntPoint m_destOrigin;
     IntPoint m_phase;
     IntSize m_tileSize;
     IntSize m_repeatSpacing;
     bool m_hasNonLocalGeometry; // Has background-attachment: fixed. Implies that we can't always cheaply compute destRect.
 };
 
 } // namespace blink
 
 #endif // BackgroundImageGeometry_h