Rename "tree of trees" to "composed tree".

third_party/WebKit/LayoutTests/fast/dom/shadow/event-path-with-dom-mutation.html

Index: third_party/WebKit/LayoutTests/fast/dom/shadow/event-path-with-dom-mutation.html
diff --git a/third_party/WebKit/LayoutTests/fast/dom/shadow/event-path-with-dom-mutation.html b/third_party/WebKit/LayoutTests/fast/dom/shadow/event-path-with-dom-mutation.html
index 832ccb1aac22afde989f89bed58276a47f1ddca0..4038f4f171b1f173884b505bb829497c145760a8 100644
--- a/third_party/WebKit/LayoutTests/fast/dom/shadow/event-path-with-dom-mutation.html
+++ b/third_party/WebKit/LayoutTests/fast/dom/shadow/event-path-with-dom-mutation.html
@@ -29,13 +29,13 @@ sandbox.appendChild(
                                                                                                createDOM('content', {'id': 'M'})))))))));
 
 ['A', 'B', 'C', 'A/', 'A/E', 'A/F', 'A/E/', 'A/E/H', 'A/E/I', 'A/E/J', 'A/E/H/', 'A/E/H/L', 'A/E/H/M'].forEach(function(path) {
-    getNodeInTreeOfTrees(path).addEventListener('click', function(event) {
+    getNodeInComposedTree(path).addEventListener('click', function(event) {
         debug('\nevent.path on node ' + dumpNode(event.currentTarget));
         debug(dumpNodeList(event.path));
     });
 });
 ['B', 'A/E/I'].forEach(function(path) {
-    getNodeInTreeOfTrees(path).addEventListener('click', function(event) {
+    getNodeInComposedTree(path).addEventListener('click', function(event) {
         debug('\nRemoving node ' + dumpNode(event.currentTarget.firstChild));
         event.currentTarget.removeChild(event.currentTarget.firstChild);
     });