Change clear() to respect the clip

include/core/SkDevice.h

 /*
  * Copyright 2010 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDevice_DEFINED
 #define SkDevice_DEFINED
 
@@ skipping 146 matching lines @@
      *  picture of the current clip. (i.e. if you regionize all of the geometry
      *  in the clipstack, you will arrive at an equivalent region to the one
      *  passed in).
      */
      virtual void setMatrixClip(const SkMatrix&, const SkRegion&,
                                 const SkClipStack&) {};
 
 private:
     /** Clears the entire device to the specified color (including alpha).
      *  Ignores the clip.
+     *  DEPRECATED : will go away when chrome subclasses have been updated
      */
-    virtual void clear(SkColor color) = 0;
+    virtual void clear(SkColor color);
 public:
 
     /** These are called inside the per-device-layer loop for each draw call.
      When these are called, we have already applied any saveLayer operations,
      and are handling any looping from the paint, and any effects from the
      DrawFilter.
      */
     virtual void drawPaint(const SkDraw&, const SkPaint& paint) = 0;
     virtual void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
                             const SkPoint[], const SkPaint& paint) = 0;
@@ skipping 218 matching lines @@
     SkDeviceProperties* fLeakyProperties;   // will always exist.
 
 #ifdef SK_DEBUG
     bool        fAttachedToCanvas;
 #endif
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif