DevTools: disable DOMAgent when profiler is active

Source/devtools/front_end/sdk/DOMModel.js

Index: Source/devtools/front_end/sdk/DOMModel.js
diff --git a/Source/devtools/front_end/sdk/DOMModel.js b/Source/devtools/front_end/sdk/DOMModel.js
index c9e9e94864b2b433b28dea731f1d9e307fdad8de..96b2e00787b39e8e1acb3b36d058c7d12cac2a05 100644
--- a/Source/devtools/front_end/sdk/DOMModel.js
+++ b/Source/devtools/front_end/sdk/DOMModel.js
@@ -903,6 +903,10 @@ WebInspector.DOMModel = function(target) {
 
     this._defaultHighlighter = new WebInspector.DefaultDOMNodeHighlighter(this._agent);
     this._highlighter = this._defaultHighlighter;
+
+    if (WebInspector.experimentsSettings.disableAgentsWhenProfile.isEnabled())
+        target.profilingLock.addEventListener(WebInspector.Lock.Events.StateChanged, this._profilingStateChanged, this);
+
     this._agent.enable();
 }
 
@@ -919,6 +923,14 @@ WebInspector.DOMModel.Events = {
 }
 
 WebInspector.DOMModel.prototype = {
+    _profilingStateChanged: function()
+    {
+        if (this.target().profilingLock.isAcquired())
+            this._agent.disable();
+        else
+            this._agent.enable();

[pfeldman, 2014/06/26 13:57:17]

Lets make ::enable call ::setDocument unless it comes from ::getDocument on
backend.

+    },
+
     /**
      * @param {function(!WebInspector.DOMDocument)=} callback
      */