Suppressing leaks in MockQuotaManagerPorxy

tools/heapcheck/suppressions.txt

 # There are three kinds of suppressions in this file.
 # 1. third party stuff we have no control over
 #
 # 2. intentional unit test errors, or stuff that is somehow a false positive
 # in our own code, or stuff that is so trivial it's not worth fixing
 #
 # 3. Suppressions for real chromium bugs that are not yet fixed.
 # These should all be in chromium's bug tracking system (but a few aren't yet).
 # Periodically we should sweep this file and the bug tracker clean by
 # running overnight and removing outdated bugs/suppressions.
@@ skipping 1605 matching lines @@
    fun:Callback2::Type* NewCallback
    fun:DownloadManager::CheckDownloadUrlDone
    fun:void DispatchToMethod
    fun:CallbackImpl::RunWithParams
    fun:CallbackRunner::Run
    fun:DownloadSBClient::SafeBrowsingCheckUrlDone
    fun:void DispatchToMethod
    fun:RunnableMethod::Run
    fun:::TaskClosureAdapter::Run
 }
+{
+   bug_83944
+   Heapcheck:Leak
+   ...
+   fun:fileapi::FileSystemTestOriginHelper::SetUp
+   fun:fileapi::FileSystemOperationTest::SetUp
+}