Centralize TextStream functions to remove RenderTreeAsText dependency of the filters

Source/core/platform/graphics/GraphicsLayer.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 316 matching lines @@
 
     // This method is used by platform GraphicsLayer classes to clear the filters
     // when compositing is not done in hardware. It is not virtual, so the caller
     // needs to notifiy the change to the platform layer as needed.
     void clearFilters() { m_filters.clear(); }
 
     void setReplicatedLayer(GraphicsLayer* layer) { m_replicatedLayer = layer; }
 
     int incrementPaintCount() { return ++m_paintCount; }
 
-    static void writeIndent(TextStream&, int indent);
-
     void dumpProperties(TextStream&, int indent, LayerTreeFlags) const;
     void dumpAdditionalProperties(TextStream&, int /*indent*/, LayerTreeFlags) const { }
 
     // Helper functions used by settors to keep layer's the state consistent.
     void updateChildList();
     void updateLayerIsDrawable();
     void updateContentsRect();
 
     void setContentsTo(ContentsLayerPurpose, WebKit::WebLayer*);
     void setupContentsLayer(WebKit::WebLayer*);
@@ skipping 70 matching lines @@
 
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showGraphicsLayerTree(const WebCore::GraphicsLayer* layer);
 #endif
 
 #endif // GraphicsLayer_h