Move rendering/RenderLayer* to layout/

Source/devtools/Inspector-1.1.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 3873 matching lines @@
         ],
         "events": []
     },
     {
         "domain": "LayerTree",
         "hidden": true,
         "types": [
             {
                 "id": "LayerId",
                 "type": "string",
-                "description": "Unique RenderLayer identifier."
+                "description": "Unique Layer identifier."
             },
             {
                 "id": "Layer",
                 "type": "object",
                 "description": "Information about a compositing layer.",
                 "properties": [
                     { "name": "layerId", "$ref": "LayerId", "description": "The unique id for this layer." },
                     { "name": "parentLayerId", "$ref": "LayerId", "optional": true, "description": "The id of parent (not present for root)." },
                     { "name": "nodeId", "$ref": "DOM.NodeId", "optional": true, "description": "The id for the node associated with this layer." },
                     { "name": "offsetX", "type": "number", "description": "Offset from parent layer, X coordinate." },
@@ skipping 67 matching lines @@
                 "parameters": [
                     { "name": "value", "type": "array", "items": { "type": "object" } }
                 ]
             },
             {
                 "name": "tracingComplete"
             }
         ]
     }]
 }