DevTools: make paint profiler target-aware

Source/devtools/front_end/sdk/LayerTreeModel.js

Index: Source/devtools/front_end/sdk/LayerTreeModel.js
diff --git a/Source/devtools/front_end/sdk/LayerTreeModel.js b/Source/devtools/front_end/sdk/LayerTreeModel.js
index cdb450406bc852fa0aa6ec04630a0105835ff58c..ef3ce1092a59f34aa71f202913defde6ac103cf8 100644
--- a/Source/devtools/front_end/sdk/LayerTreeModel.js
+++ b/Source/devtools/front_end/sdk/LayerTreeModel.js
@@ -408,7 +408,7 @@ WebInspector.AgentLayerTree.prototype = {
             if (layer)
                 layer._reset(layers[i]);
             else
-                layer = new WebInspector.AgentLayer(layers[i]);
+                layer = new WebInspector.AgentLayer(this.target(), layers[i]);
             this._layersById[layerId] = layer;
             if (layers[i].backendNodeId) {
                 layer._setNode(this.target().domModel.nodeForId(this._backendNodeIdToNodeId[layers[i].backendNodeId]));
@@ -551,10 +551,13 @@ WebInspector.Layer.prototype = {
 /**
  * @constructor
  * @implements {WebInspector.Layer}
+ * @extends {WebInspector.SDKObject}
+ * @param {!WebInspector.Target} target
  * @param {!LayerTreeAgent.Layer} layerPayload
  */
-WebInspector.AgentLayer = function(layerPayload)
+WebInspector.AgentLayer = function(target, layerPayload)
 {
+    WebInspector.SDKObject.call(this, target);
     this._reset(layerPayload);
 }
 
@@ -744,7 +747,7 @@ WebInspector.AgentLayer.prototype = {
      */
     requestSnapshot: function(callback)
     {
-        var wrappedCallback = InspectorBackend.wrapClientCallback(callback, "LayerTreeAgent.makeSnapshot(): ", WebInspector.PaintProfilerSnapshot);
+        var wrappedCallback = InspectorBackend.wrapClientCallback(callback, "LayerTreeAgent.makeSnapshot(): ", WebInspector.PaintProfilerSnapshot.bind(null, this.target()));
         LayerTreeAgent.makeSnapshot(this.id(), wrappedCallback);
     },
 
@@ -833,7 +836,9 @@ WebInspector.AgentLayer.prototype = {
         }
 
         this._children.forEach(calculateQuadForLayer);
-    }
+    },
+
+    __proto__: WebInspector.SDKObject.prototype
 }
 
 /**