DevTools: Remove target function from TimelineModel

Source/devtools/front_end/timeline/TimelinePanel.js

Index: Source/devtools/front_end/timeline/TimelinePanel.js
diff --git a/Source/devtools/front_end/timeline/TimelinePanel.js b/Source/devtools/front_end/timeline/TimelinePanel.js
index 84954d5d440a58dbfe096780f4487caff0d55de5..2f122e0523d50e6b3b288484d342c83f24752e69 100644
--- a/Source/devtools/front_end/timeline/TimelinePanel.js
+++ b/Source/devtools/front_end/timeline/TimelinePanel.js
@@ -61,6 +61,7 @@ importScript("PaintProfilerView.js");
  * @extends {WebInspector.Panel}
  * @implements {WebInspector.TimelineModeViewDelegate}
  * @implements {WebInspector.Searchable}
+ * @implements {WebInspector.TargetManager.Observer}
  */
 WebInspector.TimelinePanel = function()
 {
@@ -95,8 +96,6 @@ WebInspector.TimelinePanel = function()
     this._model.addEventListener(WebInspector.TimelineModel.Events.RecordFilterChanged, this._refreshViews, this);
     this._model.addEventListener(WebInspector.TimelineModel.Events.RecordAdded, this._onRecordAdded, this);
 
-    this._model.target().profilingLock.addEventListener(WebInspector.Lock.Events.StateChanged, this._onProfilingStateChanged, this);
-
     this._categoryFilter = new WebInspector.TimelineCategoryFilter(this._uiUtils);
     this._durationFilter = new WebInspector.TimelineIsLongFilter();
     this._textFilter = new WebInspector.TimelineTextFilter(this._uiUtils);
@@ -172,6 +171,22 @@ WebInspector.TimelinePanel.durationFilterPresetsMs = [0, 1, 15];
 
 WebInspector.TimelinePanel.prototype = {
     /**
+     * @param {!WebInspector.Target} target
+     */
+    targetAdded: function(target)
+    {
+        target.profilingLock.addEventListener(WebInspector.Lock.Events.StateChanged, this._onProfilingStateChanged, this);
+    },
+
+    /**
+     * @param {!WebInspector.Target} target
+     */
+    targetRemoved: function(target)
+    {
+        target.profilingLock.removeEventListener(WebInspector.Lock.Events.StateChanged, this._onProfilingStateChanged, this);
+    },
+
+    /**
      * @return {?WebInspector.SearchableView}
      */
     searchableView: function()
@@ -738,6 +753,7 @@ WebInspector.TimelinePanel.prototype = {
      */
     _updateToggleTimelineButton: function(toggled)
     {
+        var isAcquiredInSomeTarget = WebInspector.targetManager.targets().some(function(target) { return target.profilingLock.isAcquired(); });
         this.toggleTimelineButton.toggled = toggled;
         if (toggled) {
             this.toggleTimelineButton.title = WebInspector.UIString("Stop");
@@ -745,7 +761,7 @@ WebInspector.TimelinePanel.prototype = {
         } else if (this._stopPending) {
             this.toggleTimelineButton.title = WebInspector.UIString("Stop pending");
             this.toggleTimelineButton.setEnabled(false);
-        } else if (this._model.target().profilingLock.isAcquired()) {
+        } else if (isAcquiredInSomeTarget) {
             this.toggleTimelineButton.title = WebInspector.anotherProfilerActiveLabel();
             this.toggleTimelineButton.setEnabled(false);
         } else {
@@ -1040,7 +1056,7 @@ WebInspector.TimelinePanel.prototype = {
             break;
         case WebInspector.TimelineSelection.Type.TraceEvent:
             var event = /** @type {!WebInspector.TracingModel.Event} */ (this._selection.object());
-            WebInspector.TracingTimelineUIUtils.buildTraceEventDetails(event, this._tracingTimelineModel, this._detailsLinkifier, this._appendDetailsTabsForTraceEventAndShowDetails.bind(this, event), false, this._model.target());
+            WebInspector.TracingTimelineUIUtils.buildTraceEventDetails(event, this._tracingTimelineModel, this._detailsLinkifier, this._appendDetailsTabsForTraceEventAndShowDetails.bind(this, event), false);
             break;
         case WebInspector.TimelineSelection.Type.Frame:
             var frame = /** @type {!WebInspector.TimelineFrame} */ (this._selection.object());
@@ -1064,7 +1080,7 @@ WebInspector.TimelinePanel.prototype = {
         this.showInDetails(title, content);
         if (event.picture) {
             var paintProfilerView = this._paintProfilerView();
-            paintProfilerView.setPicture(this._model.target().weakReference(), event.picture);
+            paintProfilerView.setPicture(event.thread.target(), event.picture);
             this._detailsView.appendTab("paintProfiler", WebInspector.UIString("Paint Profiler"), paintProfilerView);
         }
     },