remove SkCanvas::createCompatibleDevice, and add SkCanvas::newSurface

include/core/SkDevice.h

Index: include/core/SkDevice.h
diff --git a/include/core/SkDevice.h b/include/core/SkDevice.h
index 250a6a3d560c56668ba414746374e7226e76a736..7c83f448d44a76dfa896e9258633ae31fe914143 100644
--- a/include/core/SkDevice.h
+++ b/include/core/SkDevice.h
@@ -367,6 +367,9 @@ protected:
     static const SkCanvas::Config8888 kPMColorAlias;
 
 protected:
+    // default impl returns NULL
+    virtual SkSurface* newSurface(const SkImageInfo&);
+
     /**
      *  Leaky properties are those which the device should be applying but it isn't.
      *  These properties will be applied by the draw, when and as it can.
@@ -382,6 +385,7 @@ private:
     friend class SkDrawIter;
     friend class SkDeviceFilteredPaint;
     friend class SkDeviceImageFilterProxy;
+    friend class DeferredDevice;    // for newSurface
 
     friend class SkSurface_Raster;