Revert of Backfill some UI tests.

content/test/test_render_view_host.cc

Index: content/test/test_render_view_host.cc
diff --git a/content/test/test_render_view_host.cc b/content/test/test_render_view_host.cc
index 527fac259ae79809673e559cd3bdc60d79a73ebf..ece1a637fb4177cc712b0a947f755e58d90785ca 100644
--- a/content/test/test_render_view_host.cc
+++ b/content/test/test_render_view_host.cc
@@ -30,12 +30,7 @@
 #include "media/base/video_frame.h"
 #include "ui/aura/env.h"
 #include "ui/compositor/compositor.h"
-#include "ui/compositor/layer_type.h"
 #include "ui/gfx/geometry/rect.h"
-
-#if defined(USE_AURA)
-#include "ui/aura/test/test_window_delegate.h"
-#endif
 
 namespace content {
 
@@ -78,13 +73,6 @@
 #endif
 
   rwh_->SetView(this);
-
-#if defined(USE_AURA)
-  window_.reset(new aura::Window(
-      aura::test::TestWindowDelegate::CreateSelfDestroyingDelegate()));
-  window_->set_owned_by_parent(false);
-  window_->Init(ui::LayerType::LAYER_NOT_DRAWN);
-#endif
 }
 
 TestRenderWidgetHostView::~TestRenderWidgetHostView() {
@@ -103,11 +91,7 @@
 }
 
 gfx::NativeView TestRenderWidgetHostView::GetNativeView() const {
-#if defined(USE_AURA)
-  return window_.get();
-#else
   return nullptr;
-#endif
 }
 
 gfx::NativeViewAccessible TestRenderWidgetHostView::GetNativeViewAccessible() {