DevTools: add support for polling for coverage data in CSS agent

third_party/WebKit/LayoutTests/inspector-protocol/css/resources/get-rule-list.css

Index: third_party/WebKit/LayoutTests/inspector-protocol/css/resources/get-rule-list.css
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/css/resources/get-rule-list.css b/third_party/WebKit/LayoutTests/inspector-protocol/css/resources/get-rule-list.css
deleted file mode 100644
index 16e811bf59238c883124bf967dacc65844d258a1..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/inspector-protocol/css/resources/get-rule-list.css
+++ /dev/null
@@ -1,24 +0,0 @@
-body {background-color: lightblue;}
-.class {color: red;}
-#id {color: blue}
-notUsed {color: black}
-@media screen and (min-width: 480px) {
-    body {
-        background-color: lightgreen;
-    }
-}
-@import "mystyle.css";
-@keyframes mymove {
-    0%   {top: 0px;}
-    25%  {top: 200px;}
-    75%  {top: 50px}
-    100% {top: 100px;}
-}
-div {
-    width: 100px;
-    height: 100px;
-    background: red;
-    position :relative;
-    -webkit-animation: mymove 5s infinite; /* Safari 4.0 - 8.0 */
-    animation: mymove 5s infinite;
-}