Removes aura suppression from drmemory

I can't repro locally. I tried with a release/debug build and with
full/light.

BUG=400495
TEST=none
R=zhaoqin@chromium.org
TBR=zhaoqin@chromium.org

Review URL: https://codereview.chromium.org/447953002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288124 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/drmemory/suppressions.txt

@@ -639,13 +639,6 @@ UNADDRESSABLE ACCESS
 name=http://code.google.com/p/dynamorio/issues/detail?id=1443
 dynamorio.dll!*
 
-UNADDRESSABLE ACCESS
-name=http://crbug.com/400495
-aura.dll!aura::Window::Contains
-aura.dll!aura::WindowEventDispatcher::OnWindowHidden
-aura.dll!aura::WindowEventDispatcher::OnPostNotifiedWindowDestroying
-aura.dll!aura::Window::~Window
-
 UNADDRESSABLE ACCESS
 name=http://crbug.com/400511
 content.dll!content::WebThreadBase::TaskObserverAdapter::WillProcessTask