Remove EditingAppleTabSpan class handling

third_party/WebKit/LayoutTests/external/wpt/editing/run/inserttext-expected.txt

Index: third_party/WebKit/LayoutTests/external/wpt/editing/run/inserttext-expected.txt
diff --git a/third_party/WebKit/LayoutTests/external/wpt/editing/run/inserttext-expected.txt b/third_party/WebKit/LayoutTests/external/wpt/editing/run/inserttext-expected.txt
index 107b148f2cbbdff114898af085552a5f2adc0b18..1d4e1d92c05d91d66b46fb655d9899d0307bc0ce 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/editing/run/inserttext-expected.txt
+++ b/third_party/WebKit/LayoutTests/external/wpt/editing/run/inserttext-expected.txt
@@ -20,7 +20,7 @@ PASS [["inserttext",""]] "foo[bar]baz" queryCommandState("inserttext") after
 PASS [["inserttext",""]] "foo[bar]baz" queryCommandValue("inserttext") after 
 PASS [["inserttext","\t"]] "foo[]bar": execCommand("inserttext", false, "\t") return value 
 PASS [["inserttext","\t"]] "foo[]bar" checks for modifications to non-editable content 
-FAIL [["inserttext","\t"]] "foo[]bar" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "foo\tbar" but got "foo<span class=\"Apple-tab-span\" style=\"white-space:pre\">\t</span>bar"
+FAIL [["inserttext","\t"]] "foo[]bar" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "foo\tbar" but got "foo<span style=\"white-space:pre\">\t</span>bar"
 PASS [["inserttext","\t"]] "foo[]bar" queryCommandIndeterm("inserttext") before 
 PASS [["inserttext","\t"]] "foo[]bar" queryCommandState("inserttext") before 
 PASS [["inserttext","\t"]] "foo[]bar" queryCommandValue("inserttext") before 
@@ -1038,7 +1038,7 @@ PASS [["inserttext","a"]] "http://a[]" queryCommandState("inserttext") after
 PASS [["inserttext","a"]] "http://a[]" queryCommandValue("inserttext") after 
 PASS [["inserttext","\t"]] "http://a[]": execCommand("inserttext", false, "\t") return value 
 PASS [["inserttext","\t"]] "http://a[]" checks for modifications to non-editable content 
-FAIL [["inserttext","\t"]] "http://a[]" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<a href=\"http://a\">http://a</a>\t" but got "http://a<span class=\"Apple-tab-span\" style=\"white-space:pre\">\t</span>"
+FAIL [["inserttext","\t"]] "http://a[]" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<a href=\"http://a\">http://a</a>\t" but got "http://a<span style=\"white-space:pre\">\t</span>"

[yosin_UTC9, 2017/03/07 05:53:17]

It seems we don't need to add |style="white-space:pre"| for "Tab SPAN".
Could you check other browser's behavior?

[joone, 2017/03/07 19:12:59]

Yes, I think so. Firefox also doesn't add a <span> tag with tab, but Blink adds 
<span class="Apple-tab-span" style="white-space:pre">	</span> for a tab.
My CL only removes "class=Apple-tab-span".

In order to pass the test fails, we have to add a tab in text node like Firefox.
I will fix it later.

[joone, 2017/03/11 00:51:43]

yosin@ do we need to create <a> for "http://a" while normalizing inline style?

 PASS [["inserttext","\t"]] "http://a[]" queryCommandIndeterm("inserttext") before 
 PASS [["inserttext","\t"]] "http://a[]" queryCommandState("inserttext") before 
 PASS [["inserttext","\t"]] "http://a[]" queryCommandValue("inserttext") before