The HTML parser should lazy attach.

LayoutTests/platform/win/fast/forms/textarea-scrolled-type-expected.txt

Index: LayoutTests/platform/win/fast/forms/textarea-scrolled-type-expected.txt
diff --git a/LayoutTests/platform/win/fast/forms/textarea-scrolled-type-expected.txt b/LayoutTests/platform/win/fast/forms/textarea-scrolled-type-expected.txt
index 52ab9b7b95b9b83c959c2c9d45c41ccc0ad905de..398765866b3bea21e6b1b818151a15b5cba7fb2f 100644
--- a/LayoutTests/platform/win/fast/forms/textarea-scrolled-type-expected.txt
+++ b/LayoutTests/platform/win/fast/forms/textarea-scrolled-type-expected.txt
@@ -14,46 +14,65 @@ layer at (0,0) size 800x600
 layer at (10,30) size 179x116 clip at (11,31) size 162x114 scrollY 224 scrollHeight 338
   RenderTextControl {TEXTAREA} at (2,22) size 179x116 [bgcolor=#FFFFFF] [border: (1px solid #000000)]
     RenderBlock {DIV} at (3,3) size 160x336
-      RenderText {#text} at (0,0) size 56x320
+      RenderText {#text} at (0,0) size 8x16
         text run at (0,0) width 8: "1"
-        text run at (8,0) width 0: " "
+      RenderBR {BR} at (8,12) size 0x0
+      RenderText {#text} at (0,16) size 8x16
         text run at (0,16) width 8: "2"
-        text run at (8,16) width 0: " "
+      RenderBR {BR} at (8,28) size 0x0
+      RenderText {#text} at (0,32) size 8x16
         text run at (0,32) width 8: "3"
-        text run at (8,32) width 0: " "
+      RenderBR {BR} at (8,44) size 0x0
+      RenderText {#text} at (0,48) size 8x16
         text run at (0,48) width 8: "4"
-        text run at (8,48) width 0: " "
+      RenderBR {BR} at (8,60) size 0x0
+      RenderText {#text} at (0,64) size 8x16
         text run at (0,64) width 8: "5"
-        text run at (8,64) width 0: " "
+      RenderBR {BR} at (8,76) size 0x0
+      RenderText {#text} at (0,80) size 8x16
         text run at (0,80) width 8: "6"
-        text run at (8,80) width 0: " "
+      RenderBR {BR} at (8,92) size 0x0
+      RenderText {#text} at (0,96) size 8x16
         text run at (0,96) width 8: "7"
-        text run at (8,96) width 0: " "
+      RenderBR {BR} at (8,108) size 0x0
+      RenderText {#text} at (0,112) size 8x16
         text run at (0,112) width 8: "8"
-        text run at (8,112) width 0: " "
+      RenderBR {BR} at (8,124) size 0x0
+      RenderText {#text} at (0,128) size 8x16
         text run at (0,128) width 8: "9"
-        text run at (8,128) width 0: " "
+      RenderBR {BR} at (8,140) size 0x0
+      RenderText {#text} at (0,144) size 16x16
         text run at (0,144) width 16: "10"
-        text run at (16,144) width 0: " "
+      RenderBR {BR} at (16,156) size 0x0
+      RenderText {#text} at (0,160) size 16x16
         text run at (0,160) width 16: "11"
-        text run at (16,160) width 0: " "
+      RenderBR {BR} at (16,172) size 0x0
+      RenderText {#text} at (0,176) size 16x16
         text run at (0,176) width 16: "12"
-        text run at (16,176) width 0: " "
+      RenderBR {BR} at (16,188) size 0x0
+      RenderText {#text} at (0,192) size 16x16
         text run at (0,192) width 16: "13"
-        text run at (16,192) width 0: " "
+      RenderBR {BR} at (16,204) size 0x0
+      RenderText {#text} at (0,208) size 16x16
         text run at (0,208) width 16: "14"
-        text run at (16,208) width 0: " "
+      RenderBR {BR} at (16,220) size 0x0
+      RenderText {#text} at (0,224) size 16x16
         text run at (0,224) width 16: "15"
-        text run at (16,224) width 0: " "
+      RenderBR {BR} at (16,236) size 0x0
+      RenderText {#text} at (0,240) size 16x16
         text run at (0,240) width 16: "16"
-        text run at (16,240) width 0: " "
+      RenderBR {BR} at (16,252) size 0x0
+      RenderText {#text} at (0,256) size 16x16
         text run at (0,256) width 16: "17"
-        text run at (16,256) width 0: " "
+      RenderBR {BR} at (16,268) size 0x0
+      RenderText {#text} at (0,272) size 56x16
         text run at (0,272) width 56: "18 Pass"
-        text run at (56,272) width 0: " "
+      RenderBR {BR} at (56,284) size 0x0
+      RenderText {#text} at (0,288) size 16x16
         text run at (0,288) width 16: "19"
-        text run at (16,288) width 0: " "
+      RenderBR {BR} at (16,300) size 0x0
+      RenderText {#text} at (0,304) size 16x16
         text run at (0,304) width 16: "20"
-        text run at (16,304) width 0: " "
+      RenderBR {BR} at (16,316) size 0x0
       RenderBR {BR} at (0,320) size 0x16
-caret: position 49 of child 0 {#text} of child 0 {DIV} of {#document-fragment} of child 3 {TEXTAREA} of body
+caret: position 7 of child 34 {#text} of child 0 {DIV} of {#document-fragment} of child 3 {TEXTAREA} of body