DevTools: migrate sources panel sidebar to views.

third_party/WebKit/Source/devtools/front_end/sources/TabbedEditorContainer.js

Index: third_party/WebKit/Source/devtools/front_end/sources/TabbedEditorContainer.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sources/TabbedEditorContainer.js b/third_party/WebKit/Source/devtools/front_end/sources/TabbedEditorContainer.js
index 7178c35048f11183bf749f84f20f2b6da2aa1bbb..fcbe43491f763e5a92d84b52267516630c1838df 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/TabbedEditorContainer.js
+++ b/third_party/WebKit/Source/devtools/front_end/sources/TabbedEditorContainer.js
@@ -214,6 +214,7 @@ WebInspector.TabbedEditorContainer.prototype = {
 
         var previousView = this._currentView;
         this._currentView = this.visibleView;
+        WebInspector.context.setFlavor(WebInspector.UISourceCodeFrame, this._currentView instanceof WebInspector.UISourceCodeFrame ? this._currentView : null);
         this._addViewListeners();
 
         var eventData = {
@@ -249,9 +250,12 @@ WebInspector.TabbedEditorContainer.prototype = {
         // FIXME: this should be replaced with common Save/Discard/Cancel dialog.
         if (!shouldPrompt || confirm(WebInspector.UIString("Are you sure you want to close unsaved file: %s?", uiSourceCode.name()))) {
             uiSourceCode.resetWorkingCopy();
+            var previousView = this._currentView;
             if (nextTabId)
                 this._tabbedPane.selectTab(nextTabId, true);
             this._tabbedPane.closeTab(id, true);
+            if (WebInspector.context.flavor(WebInspector.UISourceCodeFrame) === previousView)
+                WebInspector.context.setFlavor(WebInspector.UISourceCodeFrame, null);
             return true;
         }
         return false;