Remove unused parameter to BackgroundImageGeometry::setHasNonLocalGeometry()

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"
@@ skipping 35 matching lines @@
     void setPhaseX(int x) { m_phase.setX(x); }
     void setPhaseY(int y) { m_phase.setY(y); }
 
     void setNoRepeatX(int xOffset);
     void setNoRepeatY(int yOffset);
 
     void useFixedAttachment(const IntPoint& attachmentPoint);
 
     void clip(const IntRect&);
 
-    void setHasNonLocalGeometry(bool hasNonLocalGeometry = true) { m_hasNonLocalGeometry = hasNonLocalGeometry; }
+    void setHasNonLocalGeometry() { m_hasNonLocalGeometry = true; }
     bool hasNonLocalGeometry() const { return m_hasNonLocalGeometry; }
 
 private:
     IntRect m_destRect;
     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