[DevTools] Remove layout editor experiment.

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 9d0cf7102acee0b82db977b4fb03d02b7c4eec34..f2edae65c7f69087d5510ebd9ab2bb813673392f 100644
--- a/third_party/WebKit/Source/core/inspector/browser_protocol.json
+++ b/third_party/WebKit/Source/core/inspector/browser_protocol.json
@@ -2109,7 +2109,6 @@
                 "enum": [
                     "searchForNode",
                     "searchForUAShadowDOM",
-                    "showLayoutEditor",
                     "none"
                 ]
             }
@@ -3148,13 +3147,6 @@
                     { "name": "styleSheetId", "$ref": "StyleSheetId", "description": "Identifier of the removed stylesheet." }
                 ],
                 "description": "Fired whenever an active document stylesheet is removed."
-            },
-            {
-                "name": "layoutEditorChange",
-                "parameters": [
-                    { "name": "styleSheetId", "$ref": "StyleSheetId", "description": "Identifier of the stylesheet where the modification occurred." },
-                    { "name": "changeRange", "$ref": "SourceRange", "description": "Range where the modification occurred." }
-                ]
             }
         ]
     },