[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..ddbb6cd21be290bf4c3b3c7c7698963bee2c695d 100644
--- a/cc/blink/web_external_texture_layer_impl.h
+++ b/cc/blink/web_external_texture_layer_impl.h
@@ -11,6 +11,7 @@
 #include "cc/blink/cc_blink_export.h"
 #include "cc/layers/texture_layer_client.h"
 #include "third_party/WebKit/public/platform/WebExternalTextureLayer.h"
+#include "third_party/skia/include/core/SkPaint.h"
 
 namespace blink {
 struct WebFloatRect;
@@ -43,6 +44,7 @@ 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);

[danakj, 2014/11/04 16:02:42]

since this function only handles none vs not-none, i think a setNearestNeighbour
would be more appropriate, but, see comment in the .cc.

[jackhou1, 2014/11/12 03:35:17]

I was recommended to use an enum on the other CL (crrev.com/562583002), but we
can discuss with junov/senorblanco if you feel strongly about it.

[danakj, 2014/11/12 18:10:14]

I guess different owners with different tastes. I'd prefer to optimize for the
simplest possible API now, rather than potential future changes that are
uncertain.

If they want an enum you can turn that into a bool at some level before the call
to this method?

 
   // TextureLayerClient implementation.
   bool PrepareTextureMailbox(
@@ -64,6 +66,8 @@ class WebExternalTextureLayerImpl
   scoped_ptr<WebLayerImpl> layer_;
   ScopedVector<WebExternalBitmapImpl> free_bitmaps_;
 
+  bool nearest_neighbor_;

[danakj, 2014/11/04 16:02:42]

unused?

[jackhou1, 2014/11/12 03:35:17]

Removed.

+
   DISALLOW_COPY_AND_ASSIGN(WebExternalTextureLayerImpl);
 };