Backend for css rule tracking

third_party/WebKit/Source/core/inspector/browser_protocol.json

Index: third_party/WebKit/Source/core/inspector/browser_protocol.json
diff --git a/third_party/WebKit/Source/core/inspector/browser_protocol.json b/third_party/WebKit/Source/core/inspector/browser_protocol.json
index 502a1da736bf9e3247eb4e30da4819b1f34e16f0..33d25743d420ca95c0a5b85a66443cd935d61167 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -2760,7 +2760,8 @@
                     { "name": "selectorList", "$ref": "SelectorList", "description": "Rule selector data." },
                     { "name": "origin", "$ref": "StyleSheetOrigin", "description": "Parent stylesheet's origin."},
                     { "name": "style", "$ref": "CSSStyle", "description": "Associated style declaration." },
-                    { "name": "media", "type": "array", "items": { "$ref": "CSSMedia" }, "optional": true, "description": "Media list array (for rules involving media queries). The array enumerates media queries starting with the innermost one, going outwards." }
+                    { "name": "media", "type": "array", "items": { "$ref": "CSSMedia" }, "optional": true, "description": "Media list array (for rules involving media queries). The array enumerates media queries starting with the innermost one, going outwards." },
+                    { "name": "status", "type": "boolean", "optional": true, "description": "Indicates whether the rule was actually used by some element in the page." }
                 ],
                 "description": "CSS rule representation."
             },
@@ -3134,6 +3135,20 @@
                 ],
                 "description": "For the main document and any content documents, return the LayoutTreeNodes and a whitelisted subset of the computed style.",
                 "experimental": true
+	    },
+            {
+                "name": "setSelectorRecording",
+                "parameters": [
+                    { "name": "enable", "type": "boolean" }
+                ],
+                "description": "Enables the selector recording."
+            },
+            {
+                "name": "getRuleList",
+                "returns": [
+                    { "name": "usedCSSRules", "type": "array", "items": { "$ref": "CSSRule" } }
+                ],
+                "description": "The list of rules with an indication of whether these were used"
             }
         ],
         "events": [