change asABitmap to isABitmap on shader

src/utils/android/SkAndroidSDKCanvas.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkAndroidSDKCanvas.h"
 
 #include "SkColorFilter.h"
 #include "SkPaint.h"
 #include "SkPathEffect.h"
 #include "SkShader.h"
 #include "SkTLazy.h"
 
 namespace {
 
 /** Discard SkShaders not exposed by the Android Java API. */
 
 void CheckShader(SkPaint* paint) {
     SkShader* shader = paint->getShader();
     if (!shader) {
         return;
     }
 
-    if (shader->asABitmap(NULL, NULL, NULL) == SkShader::kDefault_BitmapType) {
+    if (shader->isABitmap()) {
         return;
     }
     if (shader->asACompose(NULL)) {
         return;
     }
     SkShader::GradientType gtype = shader->asAGradient(NULL);
     if (gtype == SkShader::kLinear_GradientType ||
         gtype == SkShader::kRadial_GradientType ||
         gtype == SkShader::kSweep_GradientType) {
         return;
@@ skipping 306 matching lines @@
     fProxyTarget->clipPath(path, op, style);
 }
 
 void SkAndroidSDKCanvas::onClipRegion(const SkRegion& region, SkRegion::Op op) {
     fProxyTarget->clipRegion(region, op);
 }
 
 void SkAndroidSDKCanvas::onDiscard() { fProxyTarget->discard(); }