Leaks reported in disk_cache::BackendIO

tools/heapcheck/suppressions.txt

Index: tools/heapcheck/suppressions.txt
diff --git a/tools/heapcheck/suppressions.txt b/tools/heapcheck/suppressions.txt
index 904a7b613242d1aecd3a3b95b379e16b7ba21a5e..d0232b174dc3f36c914f787c8168d5bb188dfd5a 100644
--- a/tools/heapcheck/suppressions.txt
+++ b/tools/heapcheck/suppressions.txt
@@ -1829,3 +1829,26 @@
    fun:ScreenshotTaker::HandleTakePartialScreenshot
    fun:ash::test::ScreenshotTakerTest_TakeScreenshot_Test::TestBody
 }
+{
+   bug_227301a
+   Heapcheck:Leak
+   fun:base::internal::WeakReferenceOwner::GetRef
+   fun:base::WeakPtrFactory::GetWeakPtr
+   fun:disk_cache::InFlightBackendIO::GetWeakPtr
+   fun:disk_cache::BackendImpl::GetBackgroundQueue
+   fun:disk_cache::EntryImpl::OnEntryCreated
+   fun:disk_cache::BackendIO::OnDone
+   fun:disk_cache::InFlightBackendIO::OnOperationComplete
+   fun:disk_cache::InFlightIO::InvokeCallback
+   fun:disk_cache::BackgroundIO::OnIOSignalled
+}
+{
+   bug_227301b
+   Heapcheck:Leak
+   ...
+   fun:disk_cache::EntryImpl::PrepareTarget
+   fun:disk_cache::EntryImpl::InternalWriteData
+   fun:disk_cache::EntryImpl::WriteDataImpl
+   fun:disk_cache::BackendIO::ExecuteEntryOperation
+   fun:disk_cache::BackendIO::ExecuteOperation
+}