[DevTools] Remove unnecessary checks for project types.

third_party/WebKit/Source/devtools/front_end/snippets/ScriptSnippetModel.js

 /*
  * Copyright (C) 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 181 matching lines @@
     var evaluationIndex = this._lastSnippetEvaluationIndexSetting.get() + 1;
     this._lastSnippetEvaluationIndexSetting.set(evaluationIndex);
     return evaluationIndex;
   }
 
   /**
    * @param {!SDK.ExecutionContext} executionContext
    * @param {!Workspace.UISourceCode} uiSourceCode
    */
   evaluateScriptSnippet(executionContext, uiSourceCode) {
+    console.assert(uiSourceCode.project().type() === Workspace.projectTypes.Snippets);
     var breakpointLocations = this._removeBreakpoints(uiSourceCode);
     this._releaseSnippetScript(uiSourceCode);
     this._restoreBreakpoints(uiSourceCode, breakpointLocations);
 
     var target = executionContext.target();
     var runtimeModel = target.runtimeModel;
     var evaluationIndex = this._nextEvaluationIndex();
     var mapping = this._mappingForTarget.get(target);
     mapping._setEvaluationIndex(evaluationIndex, uiSourceCode);
     var evaluationUrl = mapping._evaluationSourceURL(uiSourceCode);
@@ skipping 406 matching lines @@
    */
   deleteFile(url) {
     this._model.deleteScriptSnippet(url);
   }
 };
 
 /**
  * @type {!Snippets.ScriptSnippetModel}
  */
 Snippets.scriptSnippetModel = new Snippets.ScriptSnippetModel(Workspace.workspace);