Clear page display after navigation if no rendered output arrives

content/test/test_render_view_host.h

 // Copyright (c) 2012 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_TEST_TEST_RENDER_VIEW_HOST_H_
 #define CONTENT_TEST_TEST_RENDER_VIEW_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 72 matching lines @@
   void SetWindowVisibility(bool visible) override {}
   void WindowFrameChanged() override {}
   void ShowDefinitionForSelection() override {}
   bool SupportsSpeech() const override;
   void SpeakSelection() override;
   bool IsSpeaking() const override;
   void StopSpeaking() override;
 #endif  // defined(OS_MACOSX)
   void OnSwapCompositorFrame(uint32 output_surface_id,
                              scoped_ptr<cc::CompositorFrame> frame) override;
+  void ClearCompositorFrame() override {}
 
   // RenderWidgetHostViewBase implementation.
   void InitAsPopup(RenderWidgetHostView* parent_host_view,
                    const gfx::Rect& bounds) override {}
   void InitAsFullscreen(RenderWidgetHostView* reference_host_view) override {}
   void MovePluginWindows(const std::vector<WebPluginGeometry>& moves) override {
   }
   void Focus() override {}
   void SetIsLoading(bool is_loading) override {}
   void UpdateCursor(const WebCursor& cursor) override {}
@@ skipping 220 matching lines @@
  private:
   typedef scoped_ptr<ui::test::ScopedSetSupportedScaleFactors>
       ScopedSetSupportedScaleFactors;
   ScopedSetSupportedScaleFactors scoped_set_supported_scale_factors_;
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImplTestHarness);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_TEST_RENDER_VIEW_HOST_H_