WebUI: Add JavaScript lifecycle-control to WebUIMessageHandler.

content/public/test/test_web_ui.h

 // Copyright 2015 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 CONTENT_PUBLIC_TEST_TEST_WEB_UI_H_
 #define CONTENT_PUBLIC_TEST_TEST_WEB_UI_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 26 matching lines @@
   void SetLinkTransitionType(ui::PageTransition type) override {}
   int GetBindings() const override;
   void SetBindings(int bindings) override {}
   bool HasRenderFrame() override;
   void AddMessageHandler(WebUIMessageHandler* handler) override;
   void RegisterMessageCallback(const std::string& message,
                                const MessageCallback& callback) override {}
   void ProcessWebUIMessage(const GURL& source_url,
                            const std::string& message,
                            const base::ListValue& args) override {}
+  bool CanCallJavascript() override;
   void CallJavascriptFunction(const std::string& function_name) override;
   void CallJavascriptFunction(const std::string& function_name,
                               const base::Value& arg1) override;
   void CallJavascriptFunction(const std::string& function_name,
                               const base::Value& arg1,
                               const base::Value& arg2) override;
   void CallJavascriptFunction(const std::string& function_name,
                               const base::Value& arg1,
                               const base::Value& arg2,
                               const base::Value& arg3) override;
@@ skipping 32 matching lines @@
  private:
   ScopedVector<CallData> call_data_;
   ScopedVector<WebUIMessageHandler> handlers_;
   base::string16 temp_string_;
   WebContents* web_contents_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_TEST_TEST_WEB_UI_H_