DevTools: introduce multitarget model listeners

Source/devtools/front_end/sources/SourcesPanel.js

Index: Source/devtools/front_end/sources/SourcesPanel.js
diff --git a/Source/devtools/front_end/sources/SourcesPanel.js b/Source/devtools/front_end/sources/SourcesPanel.js
index d483d8b710303fde17ece38d35d765e42212a898..2bccf0acb074699598493c36b0bb6c39d7e29213 100644
--- a/Source/devtools/front_end/sources/SourcesPanel.js
+++ b/Source/devtools/front_end/sources/SourcesPanel.js
@@ -58,7 +58,6 @@ importScript("SourcesSearchScope.js");
 /**
  * @constructor
  * @implements {WebInspector.ContextMenu.Provider}
- * @implements {WebInspector.TargetManager.Observer}
  * @extends {WebInspector.Panel}
  * @param {!WebInspector.Workspace=} workspaceForTest
  */
@@ -139,44 +138,22 @@ WebInspector.SourcesPanel = function(workspaceForTest)
     this._updateDebuggerButtons();
     this._pauseOnExceptionEnabledChanged();
     WebInspector.settings.pauseOnExceptionEnabled.addChangeListener(this._pauseOnExceptionEnabledChanged, this);
-    WebInspector.targetManager.observeTargets(this);
     this._setTarget(WebInspector.context.flavor(WebInspector.Target));
     WebInspector.breakpointManager.addEventListener(WebInspector.BreakpointManager.Events.BreakpointsActiveStateChanged, this._breakpointsActiveStateChanged, this);
     WebInspector.context.addFlavorChangeListener(WebInspector.Target, this._onCurrentTargetChanged, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._debuggerWasEnabled, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerWasDisabled, this._debuggerReset, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerPaused, this._debuggerPaused, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.DebuggerResumed, this._debuggerResumed, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.CallFrameSelected, this._callFrameSelected, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.ConsoleCommandEvaluatedInSelectedCallFrame, this._consoleCommandEvaluatedInSelectedCallFrame, this);
+    WebInspector.targetManager.addModelListener(WebInspector.DebuggerModel, WebInspector.DebuggerModel.Events.GlobalObjectCleared, this._debuggerReset, this);
 }
 
 WebInspector.SourcesPanel.minToolbarWidth = 215;
 
 WebInspector.SourcesPanel.prototype = {
     /**
-     * @param {!WebInspector.Target} target
-     */
-    targetAdded: function(target)
-    {
-        target.debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._debuggerWasEnabled, this);
-        target.debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.DebuggerWasDisabled, this._debuggerReset, this);
-        target.debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.DebuggerPaused, this._debuggerPaused, this);
-        target.debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.DebuggerResumed, this._debuggerResumed, this);
-        target.debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.CallFrameSelected, this._callFrameSelected, this);
-        target.debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.ConsoleCommandEvaluatedInSelectedCallFrame, this._consoleCommandEvaluatedInSelectedCallFrame, this);
-        target.debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.GlobalObjectCleared, this._debuggerReset, this);
-    },
-
-    /**
-     * @param {!WebInspector.Target} target
-     */
-    targetRemoved: function(target)
-    {
-        target.debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.DebuggerWasEnabled, this._debuggerWasEnabled, this);
-        target.debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.DebuggerWasDisabled, this._debuggerReset, this);
-        target.debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.DebuggerPaused, this._debuggerPaused, this);
-        target.debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.DebuggerResumed, this._debuggerResumed, this);
-        target.debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.CallFrameSelected, this._callFrameSelected, this);
-        target.debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.ConsoleCommandEvaluatedInSelectedCallFrame, this._consoleCommandEvaluatedInSelectedCallFrame, this);
-        target.debuggerModel.removeEventListener(WebInspector.DebuggerModel.Events.GlobalObjectCleared, this._debuggerReset, this);
-    },
-
-    /**
      * @param {?WebInspector.Target} target
      */
     _setTarget: function(target)