Separate validation failures from other failures in ExecuteCodeFunction.

extensions/browser/api/guest_view/web_view/web_view_internal_api.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_BROWSER_API_GUEST_VIEW_WEB_VIEW_WEB_VIEW_INTERNAL_API_H_
 #define EXTENSIONS_BROWSER_API_GUEST_VIEW_WEB_VIEW_WEB_VIEW_INTERNAL_API_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 79 matching lines @@
 
 class WebViewInternalExecuteCodeFunction
     : public extensions::ExecuteCodeFunction {
  public:
   WebViewInternalExecuteCodeFunction();
 
  protected:
   ~WebViewInternalExecuteCodeFunction() override;
 
   // Initialize |details_| if it hasn't already been.
-  bool Init() override;
+  InitResult Init() override;
   bool ShouldInsertCSS() const override;
   bool CanExecuteScriptOnPage() override;
   // Guarded by a process ID check.
   extensions::ScriptExecutor* GetScriptExecutor() final;
   bool IsWebView() const override;
   const GURL& GetWebViewSrc() const override;
   bool LoadFile(const std::string& file) override;
 
  private:
   // Loads a file url on WebUI.
@@ skipping 344 matching lines @@
   uint32_t remove_mask_;
   // Tracks any data related or parse errors.
   bool bad_message_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewInternalClearDataFunction);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_GUEST_VIEW_WEB_VIEW_WEB_VIEW_INTERNAL_API_H_