Convert GrClip to an abstract base class

src/effects/SkMorphologyImageFilter.cpp

 /*
  * Copyright 2012 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.
  */
 
 #include "SkMorphologyImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 460 matching lines @@
 
 static sk_sp<SkSpecialImage> apply_morphology(GrContext* context,
                                               SkSpecialImage* input,
                                               const SkIRect& rect,
                                               GrMorphologyEffect::MorphologyType morphType,
                                               SkISize radius) {
     sk_sp<GrTexture> srcTexture(input->asTextureRef(context));
     SkASSERT(srcTexture);
 
     // setup new clip
-    const GrClip clip(SkRect::MakeWH(SkIntToScalar(srcTexture->width()),
-                                     SkIntToScalar(srcTexture->height())));
+    const GrFixedClip clip(SkIRect::MakeWH(srcTexture->width(), srcTexture->height()));
 
     const SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height());
     SkIRect srcRect = rect;
 
     SkASSERT(radius.width() > 0 || radius.height() > 0);
 
     if (radius.fWidth > 0) {
         sk_sp<GrDrawContext> dstDrawContext(context->newDrawContext(SkBackingFit::kApprox,
                                                                     rect.width(), rect.height(),
                                                                     kSkia8888_GrPixelConfig));
@@ skipping 135 matching lines @@
                     inputBM.getAddr32(srcBounds.left(), srcBounds.top()),
                     inputBM.rowBytesAsPixels(),
                     &dst, height, srcBounds);
     }
     offset->fX = bounds.left();
     offset->fY = bounds.top();
 
     return SkSpecialImage::MakeFromRaster(SkIRect::MakeWH(bounds.width(), bounds.height()),
                                           dst, &source->props());
 }