Move MainWorldScriptContext accessor/method from WebFrame to WebLocalFrame.

content/shell/test_runner/test_runner_for_specific_view.h

 // Copyright 2016 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_SHELL_TEST_RUNNER_TEST_RUNNER_FOR_SPECIFIC_VIEW_H_
 #define CONTENT_SHELL_TEST_RUNNER_TEST_RUNNER_FOR_SPECIFIC_VIEW_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 197 matching lines @@
   void EvaluateScriptInIsolatedWorld(int world_id, const std::string& script);
   void SetIsolatedWorldSecurityOrigin(int world_id,
                                       v8::Local<v8::Value> origin);
   void SetIsolatedWorldContentSecurityPolicy(int world_id,
                                              const std::string& policy);
   bool FindString(const std::string& search_text,
                   const std::vector<std::string>& options_array);
   std::string SelectionAsMarkup();
   void SetViewSourceForFrame(const std::string& name, bool enabled);
 
+  // Many parts of the layout test harness assume that the main frame is local.
+  // Having all of them go through the helper below makes it easier to catch
+  // scenarios that require breaking this assumption.
+  blink::WebLocalFrame* GetLocalMainFrame();
+
   // Helpers for accessing pointers exposed by |web_view_test_proxy_base_|.
   blink::WebView* web_view();
   WebTestDelegate* delegate();
   WebViewTestProxyBase* web_view_test_proxy_base_;
 
   base::WeakPtrFactory<TestRunnerForSpecificView> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TestRunnerForSpecificView);
 };
 
 }  // namespace test_runner
 
 #endif  // CONTENT_SHELL_TEST_RUNNER_TEST_RUNNER_FOR_SPECIFIC_VIEW_H_