cc: Do not ignore layers without valid priorities during eviction.

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index 74ff284a51c84135677169c07eb25aa2a6bd0d1e..1e88fde7b90af94fa71d97aacebd3a9c498409dc 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -7428,7 +7428,7 @@ TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
   LayerImpl* pending_layer = pending_tree->root_layer();
 
   std::vector<PictureLayerImpl::Pair> layer_pairs;
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs);
+  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
   EXPECT_EQ(1u, layer_pairs.size());
   EXPECT_EQ(pending_layer, layer_pairs[0].pending);
   EXPECT_EQ(nullptr, layer_pairs[0].active);
@@ -7445,7 +7445,7 @@ TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
   host_impl_->CreatePendingTree();
 
   layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs);
+  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
   EXPECT_EQ(1u, layer_pairs.size());
   EXPECT_EQ(active_layer, layer_pairs[0].active);
   EXPECT_EQ(pending_layer, layer_pairs[0].pending);
@@ -7454,7 +7454,7 @@ TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
   host_impl_->ActivateSyncTree();
 
   layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs);
+  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
   EXPECT_EQ(1u, layer_pairs.size());
   EXPECT_EQ(active_layer, layer_pairs[0].active);
   EXPECT_EQ(nullptr, layer_pairs[0].pending);
@@ -7468,7 +7468,7 @@ TEST_F(LayerTreeHostImplTest, GetPictureLayerImplPairs) {
   LayerImpl* new_pending_layer = pending_tree->root_layer()->children()[0];
 
   layer_pairs.clear();
-  host_impl_->GetPictureLayerImplPairs(&layer_pairs);
+  host_impl_->GetPictureLayerImplPairs(&layer_pairs, true);
   EXPECT_EQ(2u, layer_pairs.size());
 
   // The pair ordering is flaky, so make it consistent.