cc: Merge LayerTree into the LayerTreeHost.

cc/trees/layer_tree_host_unittest_occlusion.cc

Index: cc/trees/layer_tree_host_unittest_occlusion.cc
diff --git a/cc/trees/layer_tree_host_unittest_occlusion.cc b/cc/trees/layer_tree_host_unittest_occlusion.cc
index 0c3863e709ca30938e2fe587ee00ba96f27d5b26..3cc2192938a18c20fe2300a114a1231312ba23b1 100644
--- a/cc/trees/layer_tree_host_unittest_occlusion.cc
+++ b/cc/trees/layer_tree_host_unittest_occlusion.cc
@@ -41,7 +41,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnLayer
     child_->SetIsDrawable(true);
     root->AddChild(child_);
 
-    layer_tree()->SetRootLayer(root);
+    layer_tree_host()->SetRootLayer(root);
     LayerTreeTest::SetupTree();
   }
 
@@ -97,7 +97,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnSurface
     child2->SetIsDrawable(true);
     root->AddChild(child2);
 
-    layer_tree()->SetRootLayer(root);
+    layer_tree_host()->SetRootLayer(root);
     LayerTreeTest::SetupTree();
   }
 
@@ -163,7 +163,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnMask
     child2->SetIsDrawable(true);
     root->AddChild(child2);
 
-    layer_tree()->SetRootLayer(root);
+    layer_tree_host()->SetRootLayer(root);
     LayerTreeTest::SetupTree();
     client_.set_bounds(root->bounds());
   }
@@ -236,7 +236,7 @@ class LayerTreeHostOcclusionTestDrawPropertiesOnScaledMask
     child2->SetIsDrawable(true);
     root->AddChild(child2);
 
-    layer_tree()->SetRootLayer(root);
+    layer_tree_host()->SetRootLayer(root);
     LayerTreeTest::SetupTree();
     client_.set_bounds(root->bounds());
   }