Backfill some UI tests.

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 <stdint.h>
 
 #include <string>
@@ skipping 105 matching lines @@
   bool is_showing() const { return is_showing_; }
   bool is_occluded() const { return is_occluded_; }
   bool did_swap_compositor_frame() const { return did_swap_compositor_frame_; }
   void reset_did_swap_compositor_frame() { did_swap_compositor_frame_ = false; }
   bool did_change_compositor_frame_sink() {
     return did_change_compositor_frame_sink_;
   }
   void reset_did_change_compositor_frame_sink() {
     did_change_compositor_frame_sink_ = false;
   }
+  void set_native_view(gfx::NativeView native_view) {
+    native_view_ = native_view;
+  }
 
  protected:
   RenderWidgetHostImpl* rwh_;
   cc::FrameSinkId frame_sink_id_;
 
  private:
   bool is_showing_;
   bool is_occluded_;
   bool did_swap_compositor_frame_;
   bool did_change_compositor_frame_sink_ = false;
   SkColor background_color_;
   ui::DummyTextInputClient text_input_client_;
+  gfx::NativeView native_view_ = nullptr;
 };
 
 #if defined(COMPILER_MSVC)
 // See comment for same warning on RenderViewHostImpl.
 #pragma warning(push)
 #pragma warning(disable: 4250)
 #endif
 
 // TestRenderViewHost ----------------------------------------------------------
 
@@ skipping 157 matching lines @@
  private:
   typedef std::unique_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_