StylePropertySerializer should expand all property if needed.

LayoutTests/fast/css/all-shorthand-css-text-expected.txt

Index: LayoutTests/fast/css/all-shorthand-css-text-expected.txt
diff --git a/LayoutTests/fast/css/all-shorthand-css-text-expected.txt b/LayoutTests/fast/css/all-shorthand-css-text-expected.txt
index f19f8c1aca433b7f3593e1b387536c6d52c58411..1abe72a7240b5b8b9558342ab1e40e6d439fbbc6 100644
--- a/LayoutTests/fast/css/all-shorthand-css-text-expected.txt
+++ b/LayoutTests/fast/css/all-shorthand-css-text-expected.txt
@@ -3,50 +3,57 @@ Test for crbug.com/172051: all shorthand property.
 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
 
 
-PASS cssRules.length is 16
-FAIL cssRules[0].cssText should be div { all: initial; }. Was div { }.
+PASS cssRules.length is 18
+PASS cssRules[0].cssText is "div { all: initial; }"
 PASS cssRules[1].cssText is not "div { all: initial; color: red; }"
 PASS contains(cssRules[1].cssText, "color: red;") is true
-FAIL contains(cssRules[1].cssText, "background: initial;") should be true. Was false.
+PASS contains(cssRules[1].cssText, "background: initial;") is true
 PASS contains(cssRules[1].cssText, "direction: ") is false
 PASS contains(cssRules[1].cssText, "unicode-bidi: ") is false
-FAIL cssRules[2].cssText should be div { all: initial; }. Was div { color: red; }.
-FAIL cssRules[3].cssText should be div { all: initial !important; }. Was div { color: red; }.
+PASS cssRules[2].cssText is "div { all: initial; }"
+PASS cssRules[3].cssText is "div { all: initial !important; }"
 PASS cssRules[4].cssText is not "div { all: initial; color: red !important; }"
 PASS contains(cssRules[4].cssText, "color: red !important;") is true
-FAIL contains(cssRules[4].cssText, "background: initial;") should be true. Was false.
+PASS contains(cssRules[4].cssText, "background: initial;") is true
 PASS contains(cssRules[4].cssText, "direction: ") is false
 PASS contains(cssRules[4].cssText, "unicode-bidi: ") is false
 PASS cssRules[5].cssText is "div { all: inherit; }"
-FAIL cssRules[6].cssText should not be div { all: inherit; color: red; }.
+PASS cssRules[6].cssText is not "div { all: inherit; color: red; }"
 PASS contains(cssRules[6].cssText, "color: red;") is true
 PASS contains(cssRules[6].cssText, "direction: ") is false
 PASS contains(cssRules[6].cssText, "unicode-bidi: ") is false
-FAIL cssRules[7].cssText should be div { all: inherit; }. Was div { color: red; all: inherit; }.
-FAIL cssRules[8].cssText should be div { all: inherit !important; }. Was div { color: red; all: inherit !important; }.
-FAIL cssRules[9].cssText should not be div { all: inherit; color: red !important; }.
+PASS cssRules[7].cssText is "div { all: inherit; }"
+PASS cssRules[8].cssText is "div { all: inherit !important; }"
+PASS cssRules[9].cssText is not "div { all: inherit; color: red !important; }"
 PASS contains(cssRules[9].cssText, "color: red !important") is true
-FAIL contains(cssRules[9].cssText, "background: inherit;") should be true. Was false.
+PASS contains(cssRules[9].cssText, "background: inherit;") is true
 PASS contains(cssRules[9].cssText, "direction: ") is false
 PASS contains(cssRules[9].cssText, "unicode-bidi: ") is false
 PASS cssRules[10].cssText is "div { }"
-FAIL cssRules[11].cssText should be div { all: initial; direction: rtl; }. Was div { direction: rtl; }.
-FAIL cssRules[12].cssText should be div { direction: ltr; unicode-bidi: bidi-override; all: initial !important; }. Was div { direction: ltr; unicode-bidi: bidi-override; }.
+PASS cssRules[11].cssText is "div { all: initial; direction: rtl; }"
+PASS cssRules[12].cssText is "div { direction: ltr; unicode-bidi: bidi-override; all: initial !important; }"
 PASS contains(cssRules[13].cssText, "all: initial;") is false
+PASS contains(cssRules[13].cssText, "-internal-") is false
 PASS contains(cssRules[13].cssText, "direction: ltr;") is true
 PASS contains(cssRules[13].cssText, "color: red;") is true
 PASS contains(cssRules[14].cssText, "all: initial;") is false
+PASS contains(cssRules[14].cssText, "-internal-") is false
 PASS contains(cssRules[14].cssText, "font: initial;") is false
-FAIL contains(cssRules[14].cssText, "font-family: initial;") should be true. Was false.
+PASS contains(cssRules[14].cssText, "font-family: initial;") is true
 PASS contains(cssRules[15].cssText, "all: initial;") is false
+PASS contains(cssRules[15].cssText, "-internal-") is false
 PASS contains(cssRules[14].cssText, "font: initial;") is false
 PASS contains(cssRules[14].cssText, "marker: initial;") is false
 PASS contains(cssRules[15].cssText, "width: inherit;") is true
-FAIL contains(cssRules[15].cssText, "min-width: initial;") should be true. Was false.
-FAIL contains(cssRules[15].cssText, "max-width: initial;") should be true. Was false.
-FAIL contains(cssRules[15].cssText, "marker-start: initial;") should be true. Was false.
-FAIL contains(cssRules[15].cssText, "marker-mid: initial;") should be true. Was false.
-FAIL contains(cssRules[15].cssText, "marker-end: initial;") should be true. Was false.
+PASS contains(cssRules[15].cssText, "min-width: initial;") is true
+PASS contains(cssRules[15].cssText, "max-width: initial;") is true
+PASS contains(cssRules[15].cssText, "marker-start: initial;") is true
+PASS contains(cssRules[15].cssText, "marker-mid: initial;") is true
+PASS contains(cssRules[15].cssText, "marker-end: initial;") is true
+PASS cssRules[16].cssText is "div { all: unset; }"
+PASS contains(cssRules[17].cssText, "all: unset;") is false
+PASS contains(cssRules[17].cssText, "color: red;") is true
+FAIL contains(cssRules[17].cssText, "display: unset;") should be true. Was false.
 PASS successfullyParsed is true
 
 TEST COMPLETE