cc: Free Mailbox on TextureLayerImpl::ReleaseResources

cc/layers/texture_layer_impl.cc

Index: cc/layers/texture_layer_impl.cc
diff --git a/cc/layers/texture_layer_impl.cc b/cc/layers/texture_layer_impl.cc
index 3dfdcb6afbc920d2b85ebb04732994dcd445f2e3..cafe542f5d1c63a8c0759d2ab34822ac0842fed3 100644
--- a/cc/layers/texture_layer_impl.cc
+++ b/cc/layers/texture_layer_impl.cc
@@ -215,6 +215,8 @@ void TextureLayerImpl::ReleaseResources() {
     ResourceProvider* resource_provider =
         layer_tree_impl()->resource_provider();
     resource_provider->DeleteResource(external_texture_resource_);
+  } else {
+    FreeTextureMailbox();
   }
   texture_copy_.reset();
   texture_id_ = 0;