Ensure we never remove the style attribute when syncing it from CSSOM.

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

Index: third_party/WebKit/LayoutTests/external/wpt/editing/run/forecolor-expected.txt
diff --git a/third_party/WebKit/LayoutTests/external/wpt/editing/run/forecolor-expected.txt b/third_party/WebKit/LayoutTests/external/wpt/editing/run/forecolor-expected.txt
index 6994c8a0f396145dd2e6a720e455dcbfd6fc3523..b082e87748c3fe7f68c390e7f0941356ffd7c7b3 100644
--- a/third_party/WebKit/LayoutTests/external/wpt/editing/run/forecolor-expected.txt
+++ b/third_party/WebKit/LayoutTests/external/wpt/editing/run/forecolor-expected.txt
@@ -1247,7 +1247,7 @@ PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<font color=blue>foo<fon
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>": execCommand("stylewithcss", false, "false") return value 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>": execCommand("forecolor", false, "#0000FF") return value 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>" checks for modifications to non-editable content 
-FAIL [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<font color=\"blue\">foobarbaz</font>" but got "<font color=\"#0000ff\">foo</font><font color=\"#0000ff\">bar</font><font color=\"#0000ff\">baz</font>"
+FAIL [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<font color=\"blue\">foobarbaz</font>" but got "<font color=\"#0000ff\">foo</font><font style=\"\" color=\"#0000ff\">bar</font><font color=\"#0000ff\">baz</font>"
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>" queryCommandIndeterm("stylewithcss") before 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>" queryCommandState("stylewithcss") before 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<font color=blue>foo<font color=brown>[bar]</font>baz</font>" queryCommandValue("stylewithcss") before 
@@ -1327,7 +1327,7 @@ PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "foo<span id=purple>ba[r
 PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>": execCommand("stylewithcss", false, "true") return value 
 PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>": execCommand("forecolor", false, "#0000FF") return value 
 PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" checks for modifications to non-editable content 
-FAIL [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<span style=\"color:rgb(0, 0, 255)\">foo<span id=\"purple\">b<span style=\"color:rgb(0, 0, 255)\">a</span>r</span>baz</span>" but got "<span style=\"color:rgb(0, 0, 255)\">foo</span><span id=\"purple\"><span style=\"color:rgb(0, 0, 255)\">bar</span></span><span style=\"color:rgb(0, 0, 255)\">baz</span>"
+FAIL [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<span style=\"color:rgb(0, 0, 255)\">foo<span id=\"purple\">b<span style=\"color:rgb(0, 0, 255)\">a</span>r</span>baz</span>" but got "<span style=\"color:rgb(0, 0, 255)\">foo</span><span id=\"purple\" style=\"\"><span style=\"color:rgb(0, 0, 255)\">bar</span></span><span style=\"color:rgb(0, 0, 255)\">baz</span>"
 PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" queryCommandIndeterm("stylewithcss") before 
 PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" queryCommandState("stylewithcss") before 
 PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" queryCommandValue("stylewithcss") before 
@@ -1343,7 +1343,7 @@ PASS [["stylewithcss","true"],["forecolor","#0000FF"]] "<span style=\"color: rgb
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>": execCommand("stylewithcss", false, "false") return value 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>": execCommand("forecolor", false, "#0000FF") return value 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" checks for modifications to non-editable content 
-FAIL [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<span style=\"color:rgb(0, 0, 255)\">foo<span id=\"purple\">b<font color=\"#0000ff\">a</font>r</span>baz</span>" but got "<font color=\"#0000ff\">foo</font><span id=\"purple\"><font color=\"#0000ff\">bar</font></span><font color=\"#0000ff\">baz</font>"
+FAIL [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" compare innerHTML assert_equals: Unexpected innerHTML (after normalizing inline style) expected "<span style=\"color:rgb(0, 0, 255)\">foo<span id=\"purple\">b<font color=\"#0000ff\">a</font>r</span>baz</span>" but got "<font color=\"#0000ff\">foo</font><span id=\"purple\" style=\"\"><font color=\"#0000ff\">bar</font></span><font color=\"#0000ff\">baz</font>"
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" queryCommandIndeterm("stylewithcss") before 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" queryCommandState("stylewithcss") before 
 PASS [["stylewithcss","false"],["forecolor","#0000FF"]] "<span style=\"color: rgb(0, 0, 255)\">foo<span id=purple>b[a]r</span>baz</span>" queryCommandValue("stylewithcss") before