remove Proxy entrypoints for canHandleFilter

include/core/SkImageFilter.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkImageFilter_DEFINED
 #define SkImageFilter_DEFINED
 
@@ skipping 65 matching lines @@
         SkMatrix fCTM;
         SkIRect  fClipBounds;
         Cache* fCache;
     };
 
     class Proxy {
     public:
         virtual ~Proxy() {};
 
         virtual SkBaseDevice* createDevice(int width, int height) = 0;
-        // returns true if the proxy can handle this filter natively
-        virtual bool canHandleImageFilter(const SkImageFilter*) = 0;
         // returns true if the proxy handled the filter itself. if this returns
         // false then the filter's code will be called.
         virtual bool filterImage(const SkImageFilter*, const SkBitmap& src,
                                  const Context&,
                                  SkBitmap* result, SkIPoint* offset) = 0;
         virtual const SkSurfaceProps* surfaceProps() const = 0;
     };
 
     /**
      *  Request a new (result) image to be created from the src image.
@@ skipping 263 matching lines @@
  */
 #define SK_IMAGEFILTER_UNFLATTEN_COMMON(localVar, expectedCount)    \
     Common localVar;                                                \
     do {                                                            \
         if (!localVar.unflatten(buffer, expectedCount)) {           \
             return NULL;                                            \
         }                                                           \
     } while (0)
 
 #endif