use ClipOp instead of SkRegion for clipping

samplecode/SampleApp.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleApp.h"
 
 #include "OverView.h"
@@ skipping 1290 matching lines @@
 #if SK_SUPPORT_GPU
         if (kNullGPU_DeviceType != fDeviceType)
 #endif
         {
             canvas = this->INHERITED::beforeChildren(canvas);
         }
     }
 
     if (fUseClip) {
         canvas->drawColor(0xFFFF88FF);
-        canvas->clipPath(fClipPath, SkRegion::kIntersect_Op, true);
+        canvas->clipPath(fClipPath, kIntersect_SkClipOp, true);
     }
 
     return canvas;
 }
 #include "SkMultiPictureDraw.h"
 void SampleWindow::afterChildren(SkCanvas* orig) {
     if (fSaveToPdf) {
         fSaveToPdf = false;
         fPDFDocument->endPage();
         fPDFDocument.reset(NULL);
@@ skipping 1111 matching lines @@
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
     SkGraphics::Term();
 }