asan: Fix asan leak from r274404.

content/browser/web_contents/web_contents_view_aura_browsertest.cc

Index: content/browser/web_contents/web_contents_view_aura_browsertest.cc
diff --git a/content/browser/web_contents/web_contents_view_aura_browsertest.cc b/content/browser/web_contents/web_contents_view_aura_browsertest.cc
index fa9f3bde7fcd7eac25ac3d8ff5197bd2fa574b09..d4f85238b1ae29ad511069a9f408fb2a20860ccd 100644
--- a/content/browser/web_contents/web_contents_view_aura_browsertest.cc
+++ b/content/browser/web_contents/web_contents_view_aura_browsertest.cc
@@ -31,6 +31,7 @@
 #include "ui/aura/window.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
+#include "ui/compositor/test/draw_waiter_for_test.h"
 #include "ui/events/event_processor.h"
 #include "ui/events/event_utils.h"
 
@@ -262,6 +263,15 @@ class WebContentsViewAuraTest : public ContentBrowserTest {
   }
 
  private:
+  // BrowserTestBase:
+  virtual void TearDownOnMainThread() OVERRIDE {
+    aura::Window* window = shell()->web_contents()->GetNativeView();
+    ui::Compositor* compositor = window->layer()->GetCompositor();
+    while (compositor->layer_animator_collection()->HasActiveAnimators())
+      ui::DrawWaiterForTest::Wait(compositor);

[sky, 2014/06/03 13:19:15]

This seems easy to miss. Who owns these animations and how come they aren't
normally destroyed when the owner is destroyed?

[sadrul, 2014/06/03 18:35:04]

This CL was reverted (along with the original CL). I am going to look for a
better fix than this. I will ping for a review when I find one.

+    ContentBrowserTest::TearDownOnMainThread();
+  }
+
   ScreenshotTracker* screenshot_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsViewAuraTest);