getDeviceCapabilities is no longer need, so remove it

src/utils/SkGatherPixelRefsAndRects.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkGatherPixelRefsAndRects_DEFINED
 #define SkGatherPixelRefsAndRects_DEFINED
 
@@ skipping 19 matching lines @@
         SkSafeRef(fPRCont);
         fEmptyBitmap.setConfig(SkImageInfo::Make(width, height,
                                                  kUnknown_SkColorType,
                                                  kIgnore_SkAlphaType));
     }
 
     virtual ~SkGatherPixelRefsAndRectsDevice() {
         SkSafeUnref(fPRCont);
     }
 
-    virtual uint32_t getDeviceCapabilities() SK_OVERRIDE { return 0; }
-
     virtual int width() const SK_OVERRIDE { return fSize.width(); }
     virtual int height() const SK_OVERRIDE { return fSize.height(); }
     virtual bool isOpaque() const SK_OVERRIDE { return false; }
     virtual SkBitmap::Config config() const SK_OVERRIDE {
         return SkBitmap::kNo_Config;
     }
     virtual SkImageInfo imageInfo() const SK_OVERRIDE {
         return fEmptyBitmap.info();
     }
 
@@ skipping 294 matching lines @@
     static void NotSupported() {
         SkDEBUGFAIL("this method should never be called");
     }
 
     static void NothingToDo() {}
 
     typedef SkBaseDevice INHERITED;
 };
 
 #endif // SkGatherPixelRefsAndRects_DEFINED