Rewrite editing/inserting/typing-at-end-of-line.html to utilize assert_selection()

third_party/WebKit/LayoutTests/platform/mac/editing/inserting/typing-at-end-of-line-expected.txt

Index: third_party/WebKit/LayoutTests/platform/mac/editing/inserting/typing-at-end-of-line-expected.txt
diff --git a/third_party/WebKit/LayoutTests/platform/mac/editing/inserting/typing-at-end-of-line-expected.txt b/third_party/WebKit/LayoutTests/platform/mac/editing/inserting/typing-at-end-of-line-expected.txt
deleted file mode 100644
index cab2c88fe50f631f877983d180b947d2ad6b05df..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/platform/mac/editing/inserting/typing-at-end-of-line-expected.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-layer at (0,0) size 800x600 scrollWidth 879
-  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 {DIV} at (0,0) size 784x54
-        LayoutText {#text} at (0,0) size 785x54
-          text run at (0,0) width 781: "This test validates the fix for a bug that occurred when typing a blank at the end of a line when the character doesn't fix by"
-          text run at (0,18) width 785: "a fraction of a pixel. If the test runs correctly, you should see the word 'you' at the end of the line and the word 'have' at the"
-          text run at (0,36) width 204: "beginning of the following line."
-      LayoutBlockFlow (anonymous) at (0,54) size 784x18
-        LayoutBR {BR} at (0,0) size 0x18
-      LayoutBlockFlow {DIV} at (0,72) size 871x100
-        LayoutText {#text} at (0,0) size 871x30
-          text run at (0,0) width 868: "and Anna, you can do your regular weekly report run, and I'll extract the key sections into this. Andrew and Mark, I'd like to include any new bits you"
-          text run at (867,0) width 4: " "
-          text run at (0,15) width 31: " have"
-caret: position 158 of child 0 {#text} of child 5 {DIV} of body