Use process/control messages (instead of RVH messages) for layout tests.

content/shell/browser/layout_test/blink_test_controller.h

 // Copyright 2013 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_BROWSER_LAYOUT_TEST_BLINK_TEST_CONTROLLER_H_
 #define CONTENT_SHELL_BROWSER_LAYOUT_TEST_BLINK_TEST_CONTROLLER_H_
 
 #include <map>
 #include <memory>
 #include <ostream>
@@ skipping 120 matching lines @@
                             const base::FilePath& current_working_directory,
                             bool enable_pixel_dumping,
                             const std::string& expected_pixel_hash);
   // True if the controller was reset successfully.
   bool ResetAfterLayoutTest();
 
   // IPC messages forwarded from elsewhere.
   void OnLayoutTestRuntimeFlagsChanged(
       int sender_process_host_id,
       const base::DictionaryValue& changed_layout_test_runtime_flags);
+  void OnPrintMessage(const std::string& message);
   void OnTestFinishedInSecondaryRenderer();
 
   // Makes sure that the potentially new renderer associated with |frame| is 1)
   // initialized for the test, 2) kept up to date wrt test flags and 3)
   // monitored for crashes.
   void HandleNewRenderFrameHost(RenderFrameHost* frame);
 
   void SetTempPath(const base::FilePath& temp_path);
   void RendererUnresponsive();
   void OverrideWebkitPrefs(WebPreferences* prefs);
@@ skipping 42 matching lines @@
   static BlinkTestController* instance_;
 
   void DiscardMainWindow();
 
   // Message handlers.
   void OnAudioDump(const std::vector<unsigned char>& audio_dump);
   void OnImageDump(const std::string& actual_pixel_hash, const SkBitmap& image);
   void OnTextDump(const std::string& dump);
   void OnInitiateLayoutDump();
   void OnLayoutDumpResponse(RenderFrameHost* sender, const std::string& dump);
-  void OnPrintMessage(const std::string& message);
   void OnOverridePreferences(const WebPreferences& prefs);
   void OnTestFinished();
   void OnClearDevToolsLocalStorage();
   void OnShowDevTools(const std::string& settings,
                       const std::string& frontend_url);
   void OnEvaluateInDevTools(int call_id, const std::string& script);
   void OnCloseDevTools();
   void OnGoToOffset(int offset);
   void OnReload();
   void OnLoadURLForFrame(const GURL& url, const std::string& frame_name);
@@ skipping 73 matching lines @@
   // waiting on the UI thread while layout tests are being ran.
   ScopedAllowWaitForAndroidLayoutTests reduced_restrictions_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(BlinkTestController);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_LAYOUT_TEST_BLINK_TEST_CONTROLLER_H_