[cc] Add nearest neighbor filtering for TextureLayer.

cc/blink/web_external_texture_layer_impl.h

Index: cc/blink/web_external_texture_layer_impl.h
diff --git a/cc/blink/web_external_texture_layer_impl.h b/cc/blink/web_external_texture_layer_impl.h
index 853b1a079258e5c6771a6167b5d47c82d0120ae4..81693c2178bc6504526c5fa8de58d378d9ac10cd 100644
--- a/cc/blink/web_external_texture_layer_impl.h
+++ b/cc/blink/web_external_texture_layer_impl.h
@@ -43,6 +43,7 @@ class WebExternalTextureLayerImpl
   virtual void setPremultipliedAlpha(bool premultiplied);
   virtual void setBlendBackgroundColor(bool blend);
   virtual void setRateLimitContext(bool rate_limit);
+  virtual void setFilterLevel(SkPaint::FilterLevel filter_level);
 
   // TextureLayerClient implementation.
   bool PrepareTextureMailbox(
@@ -64,6 +65,8 @@ class WebExternalTextureLayerImpl
   scoped_ptr<WebLayerImpl> layer_;
   ScopedVector<WebExternalBitmapImpl> free_bitmaps_;
 
+  bool nearest_neighbor_;
+
   DISALLOW_COPY_AND_ASSIGN(WebExternalTextureLayerImpl);
 };