[cc] Add nearest neighbor filtering for TextureLayer.

cc/blink/web_external_texture_layer_impl.cc

Index: cc/blink/web_external_texture_layer_impl.cc
diff --git a/cc/blink/web_external_texture_layer_impl.cc b/cc/blink/web_external_texture_layer_impl.cc
index 85aac10fe0d079a16c7ac103acfabb8f3a181839..65e25da516b5dae6484f589f2a0a26c0886bd079 100644
--- a/cc/blink/web_external_texture_layer_impl.cc
+++ b/cc/blink/web_external_texture_layer_impl.cc
@@ -62,6 +62,12 @@ void WebExternalTextureLayerImpl::setRateLimitContext(bool rate_limit) {
   static_cast<TextureLayer*>(layer_->layer())->SetRateLimitContext(rate_limit);
 }
 
+void WebExternalTextureLayerImpl::setFilterLevel(
+    SkPaint::FilterLevel filter_level) {
+  static_cast<TextureLayer*>(layer_->layer())
+      ->SetNearestNeighbor(filter_level == SkPaint::kNone_FilterLevel);

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

You have multiple ways of setting nearest neighbour here? Why is that needed?
Isn't doing it through PrepareTextureMailbox enough?

[piman, 2014/11/04 21:14:35]

There's 2 things, that may or may not be in sync:
1- the state that's in the texture
2- how you want the quad to be displayed

This is #2. l.94 is #1.

[danakj, 2014/11/04 21:30:23]

Ah okay, thanks.

+}
+
 bool WebExternalTextureLayerImpl::PrepareTextureMailbox(
     cc::TextureMailbox* mailbox,
     scoped_ptr<cc::SingleReleaseCallback>* release_callback,
@@ -85,6 +91,7 @@ bool WebExternalTextureLayerImpl::PrepareTextureMailbox(
         cc::TextureMailbox(name, GL_TEXTURE_2D, client_mailbox.syncPoint);
   }
   mailbox->set_allow_overlay(client_mailbox.allowOverlay);
+  mailbox->set_nearest_neighbor(client_mailbox.nearestNeighbor);
 
   if (mailbox->IsValid()) {
     *release_callback = cc::SingleReleaseCallback::Create(