Rename 'composed tree' to 'flat tree' in the layout tests.

third_party/WebKit/LayoutTests/fast/dom/shadow/composed-shadow-tree-walker-expected.txt

-CONSOLE WARNING: Calling Element.createShadowRoot() for an element which already hosts a shadow root is deprecated. See https://www.chromestatus.com/features/4668884095336448 for more details.
-Tests for Composed Shadow DOM Tree Traversal APIs. Can only run within DRT
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-ShadowRoot should be used.
-Composed Shadow Tree:
-#a
-        #b
-
-Traverse in forward.
-#a
-#b
-Traverse in backward.
-#b
-#a
-
-A content element should select light children
-Composed Shadow Tree:
-#a
-        #b
-        #c
-        #d
-
-Traverse in forward.
-#a
-#b
-#c
-#d
-Traverse in backward.
-#d
-#c
-#b
-#a
-
-Test for content element selector.
-Composed Shadow Tree:
-#a
-        #b
-        #d
-
-Traverse in forward.
-#a
-#b
-#d
-Traverse in backward.
-#d
-#b
-#a
-
-Light children should be selected only at once.
-Composed Shadow Tree:
-#a
-        #b
-        #d
-        #c
-        #e
-
-Traverse in forward.
-#a
-#b
-#d
-#c
-#e
-Traverse in backward.
-#e
-#c
-#d
-#b
-#a
-
-A content element can have fallback elements.
-Composed Shadow Tree:
-#a
-        #b
-        #f1
-        #f2
-
-Traverse in forward.
-#a
-#b
-#f1
-#f2
-Traverse in backward.
-#f2
-#f1
-#b
-#a
-
-Fallback elements should not be used if a content element selects an element.
-Composed Shadow Tree:
-#a
-        #b
-        #c
-
-Traverse in forward.
-#a
-#b
-#c
-Traverse in backward.
-#c
-#b
-#a
-
-Test for traversal, starting with a fallback element which is not used.
-Composed Shadow Tree:
-#f1
-        #f2
-
-Traverse in forward.
-#f1
-#f2
-Traverse in backward.
-#f2
-#f1
-
-Next node of [#f1] is [#f2]
-Next node of [#f2] is [null]
-
-Test for Nested ShadowRoots.
-Composed Shadow Tree:
-#a
-        #b
-                #c
-                #e
-                #d
-        #f
-        #h
-        #i
-        #g
-
-Traverse in forward.
-#a
-#b
-#c
-#e
-#d
-#f
-#h
-#i
-#g
-Traverse in backward.
-#g
-#i
-#h
-#f
-#d
-#e
-#c
-#b
-#a
-
-Test for Multiple ShadowRoots.
-Composed Shadow Tree:
-#a
-        #d
-        #b
-        #f
-        #c
-        #e
-
-Traverse in forward.
-#a
-#d
-#b
-#f
-#c
-#e
-Traverse in backward.
-#e
-#c
-#f
-#b
-#d
-#a
-
-Test for inactive insertion points.
-Composed Shadow Tree:
-#a
-        #b
-                #c
-
-Traverse in forward.
-#a
-#b
-#c
-Traverse in backward.
-#c
-#b
-#a
-
-Test for an orphaned shadow subtree.
-Composed Shadow Tree:
-#a
-        #d
-
-Traverse in forward.
-#a
-#d
-Traverse in backward.
-#d
-#a
-
-Test for traversal, starting with a node in an orphaned shadow subtree.
-Composed Shadow Tree:
-#b
-        #c
-
-Traverse in forward.
-#b
-#c
-Traverse in backward.
-#c
-#b
-
-Test for a content element which does not select any nodes nor have fallback elements.
-Composed Shadow Tree:
-#a
-        #b
-        #c
-
-Traverse in forward.
-#a
-#b
-#c
-Traverse in backward.
-#c
-#b
-#a
-
-Test for a nested insertion point.
-Composed Shadow Tree:
-#a
-        #b
-                #c
-
-Traverse in forward.
-#a
-#b
-#c
-Traverse in backward.
-#c
-#b
-#a
-
-Test for nested insertion points. Some of them are either empty insertion points or inactive insertion points.
-Composed Shadow Tree:
-#a
-        #b
-                #c
-                #d
-                #e
-
-Traverse in forward.
-#a
-#b
-#c
-#d
-#e
-Traverse in backward.
-#e
-#d
-#c
-#b
-#a
-
-Test for a re-projection.
-Composed Shadow Tree:
-#a
-        #b
-                #c
-
-Traverse in forward.
-#a
-#b
-#c
-Traverse in backward.
-#c
-#b
-#a
-
-Test for a content element which is selected by another content element.
-Composed Shadow Tree:
-#a
-        #b
-                #most-inner-child
-                #host-child
-
-Traverse in forward.
-#a
-#b
-#most-inner-child
-#host-child
-Traverse in backward.
-#host-child
-#most-inner-child
-#b
-#a
-
-Test for a reprojection. Content elements should be used in document order.
-Composed Shadow Tree:
-#a
-        #host-child1
-        #b
-                #host-child2
-
-Traverse in forward.
-#a
-#host-child1
-#b
-#host-child2
-Traverse in backward.
-#host-child2
-#b
-#host-child1
-#a
-
-Test for complex re-projections.
-Composed Shadow Tree:
-#a
-        #b
-                #child-1
-                #d
-                        #e
-                        #child-2
-                        #g
-                        #f
-                #h
-                #c
-
-Traverse in forward.
-#a
-#b
-#child-1
-#d
-#e
-#child-2
-#g
-#f
-#h
-#c
-Traverse in backward.
-#c
-#h
-#f
-#g
-#child-2
-#e
-#d
-#child-1
-#b
-#a
-
-Test for a shadow insertion point where nothing is distributed.
-Composed Shadow Tree:
-#a
-        #b
-        #c
-
-Traverse in forward.
-#a
-#b
-#c
-Traverse in backward.
-#c
-#b
-#a
-
-PASS successfullyParsed is true
-
-TEST COMPLETE
-