asABitmap is deprecated, switch over to (simpler) isABitmap

skia/ext/pixel_ref_utils.cc

Index: skia/ext/pixel_ref_utils.cc
diff --git a/skia/ext/pixel_ref_utils.cc b/skia/ext/pixel_ref_utils.cc
index d7e2f7e62efa7f9cdc448a5d58a8b5b2c55a941a..cbd2ff26599eaa5eda8df9ab5f4bb1ed18984053 100644
--- a/skia/ext/pixel_ref_utils.cc
+++ b/skia/ext/pixel_ref_utils.cc
@@ -362,13 +362,7 @@ class GatherPixelRefDevice : public SkBitmapDevice {
 
   bool GetBitmapFromPaint(const SkPaint& paint, SkBitmap* bm) {
     SkShader* shader = paint.getShader();
-    if (shader) {
-      // Check whether the shader is a gradient in order to prevent generation
-      // of bitmaps from gradient shaders, which implement asABitmap.
-      if (SkShader::kNone_GradientType == shader->asAGradient(NULL))
-        return shader->asABitmap(bm, NULL, NULL);
-    }
-    return false;
+    return shader && shader->isABitmap(bm, NULL, NULL);
   }
 };