Convert editing/selection/node-removal-2.html using assert_selection().

third_party/WebKit/LayoutTests/platform/linux/editing/selection/node-removal-2-expected.txt

-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-EDITING DELEGATE: webViewDidChangeSelection:WebViewDidChangeSelectionNotification
-layer at (0,0) size 800x600
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  LayoutBlockFlow {HTML} at (0,0) size 800x600
-    LayoutBlockFlow {BODY} at (8,8) size 784x584
-      LayoutBlockFlow {P} at (0,0) size 784x40
-        LayoutText {#text} at (0,0) size 747x39
-          text run at (0,0) width 678: "This tests behavior when a node that serves as the start or end of a selection is removed from the document. "
-          text run at (678,0) width 69: "Ideally, we"
-          text run at (0,20) width 649: "would just adjust the selection when an endpoint is removed, for now, we just blow away the selection."
-      LayoutBlockFlow {P} at (0,56) size 784x40
-        LayoutText {#text} at (0,0) size 771x39
-          text run at (0,0) width 475: "This test creates a selection that ends inside of a node that will be removed. "
-          text run at (475,0) width 172: "Then the node is removed. "
-          text run at (647,0) width 124: "Then a Select All is"
-          text run at (0,20) width 64: "executed. "
-          text run at (64,20) width 253: "The entire document should be selected."
-      LayoutBlockFlow {DIV} at (0,112) size 784x20
-        LayoutText {#text} at (0,0) size 35x19
-          text run at (0,0) width 35: "hello "
-        LayoutText {#text} at (35,0) size 42x19
-          text run at (35,0) width 42: "world!"
-selection start: position 0 of child 0 {#text} of child 1 {P} of body
-selection end:   position 7 of child 1 {#text} of child 5 {DIV} of body