[DevTools] Avoid assertion failure

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

 /*
  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 520 matching lines @@
    */
   _runSnippet() {
     var uiSourceCode = this._sourcesView.currentUISourceCode();
     if (!uiSourceCode)
       return false;
 
     var currentExecutionContext = UI.context.flavor(SDK.ExecutionContext);
     if (!currentExecutionContext)
       return false;
 
+    if (uiSourceCode.project().type() !== Workspace.projectTypes.Snippets)
+      return false;
+
     Snippets.scriptSnippetModel.evaluateScriptSnippet(currentExecutionContext, uiSourceCode);
     return true;
   }
 
   /**
    * @param {!Common.Event} event
    */
   _editorSelected(event) {
     var uiSourceCode = /** @type {!Workspace.UISourceCode} */ (event.data);
     if (this.editorView.mainWidget() && Common.moduleSetting('autoRevealInNavigator').get())
@@ skipping 756 matching lines @@
    */
   willHide() {
     UI.inspectorView.setDrawerMinimized(false);
     setImmediate(() => Sources.SourcesPanel.updateResizerAndSidebarButtons(Sources.SourcesPanel.instance()));
   }
 
   _showViewInWrapper() {
     this._view.show(this.element);
   }
 };