For unit tests, track additions to AtExitManager and warn.

content/public/test/test_renderer_host.h

Index: content/public/test/test_renderer_host.h
diff --git a/content/public/test/test_renderer_host.h b/content/public/test/test_renderer_host.h
index 32035440d159ca79dc3a100db473917ceab45b25..88f19dede87e596b645f919645b5f58c5e6f290d 100644
--- a/content/public/test/test_renderer_host.h
+++ b/content/public/test/test_renderer_host.h
@@ -8,9 +8,9 @@
 
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
+#include "base/test/unit_test.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/common/page_transition_types.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 #if defined(USE_AURA)
 #include "ui/aura/test/aura_test_helper.h"
@@ -118,7 +118,7 @@ class RenderViewHostTestEnabler {
 };
 
 // RenderViewHostTestHarness ---------------------------------------------------
-class RenderViewHostTestHarness : public testing::Test {
+class RenderViewHostTestHarness : public base::UnitTest {

[Scott Byer, 2012/06/18 23:45:57]

This is the test harness that surrounds both the new unit test I was working on
and one of the unit_tests I saw a problem with. I suspect there are other
subclasses of testing::Test that should also be lifted up and adhere to the
invariant.

  public:
   RenderViewHostTestHarness();
   virtual ~RenderViewHostTestHarness();