Split up leak detector into two stages for better leak reporting.

content/public/test/render_view_test.cc

Index: content/public/test/render_view_test.cc
diff --git a/content/public/test/render_view_test.cc b/content/public/test/render_view_test.cc
index 9d546d8f7afbf8a1168351c9cbf096715aa529cb..0cb39a4b6617bb126d78529b8fd960df8f35f157 100644
--- a/content/public/test/render_view_test.cc
+++ b/content/public/test/render_view_test.cc
@@ -293,7 +293,7 @@ void RenderViewTest::TearDown() {
   scoped_ptr<blink::WebLeakDetector> leak_detector =
       make_scoped_ptr(blink::WebLeakDetector::create(this));
 
-  leak_detector->collectGarbageAndGetDOMCounts(GetMainFrame());
+  leak_detector->prepareForLeakDetection(GetMainFrame());
 
   view_ = NULL;
   mock_process_.reset();
@@ -308,6 +308,8 @@ void RenderViewTest::TearDown() {
   autorelease_pool_.reset(NULL);
 #endif
 
+  leak_detector->collectGarbageAndReport();
+
   blink_platform_impl_.Shutdown();
   blink::shutdown();