DevTools: migrate from CSS.setPropertyText to CSS.setStyleText

LayoutTests/inspector/elements/styles-4/styles-formatting.html

Index: LayoutTests/inspector/elements/styles-4/styles-formatting.html
diff --git a/LayoutTests/inspector/elements/styles-4/styles-formatting.html b/LayoutTests/inspector/elements/styles-4/styles-formatting.html
index e6cb7cbcc95ef829abfe917a6b36e42962cf3ad9..c5d84ac5441b26f95d36f91ba44f3f349be2873c 100644
--- a/LayoutTests/inspector/elements/styles-4/styles-formatting.html
+++ b/LayoutTests/inspector/elements/styles-4/styles-formatting.html
@@ -33,7 +33,7 @@ function test()
 
         function testFormattedInsertStart(next)
         {
-            formattedStyle.insertPropertyAt(0, "firstProperty", "firstValue", dumpFormattedAndCallNext.bind(null, next));
+            formattedStyle.insertPropertyAt(0, "firstProperty", "rgba(1, 2, 3, 0)", dumpFormattedAndCallNext.bind(null, next));
         },
 
         function testFormattedRemoveStart(next)
@@ -43,7 +43,7 @@ function test()
 
         function testFormattedInsertMiddle(next)
         {
-            formattedStyle.insertPropertyAt(1, "middleProperty", "middleValue", dumpFormattedAndCallNext.bind(null, next));
+            formattedStyle.insertPropertyAt(1, "middleProperty", "middleValue /* comment */", dumpFormattedAndCallNext.bind(null, next));
         },
 
         function testFormattedRemoveMiddle(next)