Makes a couple of tests properly delete aura state. These tests don't

chrome/test/base/chrome_render_view_host_test_harness.cc

Index: chrome/test/base/chrome_render_view_host_test_harness.cc
diff --git a/chrome/test/base/chrome_render_view_host_test_harness.cc b/chrome/test/base/chrome_render_view_host_test_harness.cc
index d75bb8d0fe62efbba10457ac9aeab8c4d23d67d4..26569e7e51f21b89c7c41e4a55806a36195973e2 100644
--- a/chrome/test/base/chrome_render_view_host_test_harness.cc
+++ b/chrome/test/base/chrome_render_view_host_test_harness.cc
@@ -6,6 +6,11 @@
 
 #include "chrome/test/base/testing_profile.h"
 
+#if defined(USE_AURA)
+#include "ui/aura/root_window.h"
+#include "ui/aura_shell/shell.h"
+#endif
+
 ChromeRenderViewHostTestHarness::ChromeRenderViewHostTestHarness()
     : RenderViewHostTestHarness() {
 }
@@ -25,4 +30,8 @@ void ChromeRenderViewHostTestHarness::SetUp() {
 
 void ChromeRenderViewHostTestHarness::TearDown() {
   RenderViewHostTestHarness::TearDown();
+#if defined(USE_AURA)
+  aura_shell::Shell::DeleteInstance();
+  aura::RootWindow::DeleteInstance();
+#endif
 }