Suppress the common part of an NtCreateEvent leak between several bugs.

tools/valgrind/drmemory/suppressions.txt

 # This file contains suppressions for the Dr.Memory tool, see
 # http://dev.chromium.org/developers/how-tos/using-drmemory
 #
 # This file contains suppressions for the DrMemory reports happening
 # in the 'light' mode (a.k.a. drmemory_light) as well as in the 'full' mode.
 # Please use suppressions_full.txt for all the reports that can happen only
 # in the full mode (drmemory_full),
 
 ############################
 # Known reports on the third party we have no control over.
@@ skipping 553 matching lines @@
 UNADDRESSABLE ACCESS
 name=http://crbug.com/382784
 *!content::PepperMediaStreamAudioTrackHost::AudioSink::OnData
 *!content::MediaStreamAudioSinkOwner::OnData
 *!content::WebRtcLocalAudioTrack::Capture
 *!content::WebRtcAudioCapturer::Capture
 *!media::AudioInputDevice::AudioThreadCallback::Process
 *!media::AudioDeviceThread::Thread::Run
 *!media::AudioDeviceThread::Thread::ThreadMain
 
-HANDLE LEAK
-name=http://crbug.com/383408
-system call NtCreateEvent
-...
-*!base::internal::LockImpl::Lock
-*!mojo::system::MessagePipe::RemoveWaiter
-*!mojo::system::MessagePipeDispatcher::RemoveWaiterImplNoLock
-*!mojo::system::Dispatcher::RemoveWaiter
-*!mojo::system::Core::WaitManyInternal
-*!mojo::system::Core::WaitMany
-*!MojoWaitMany
-
 UNADDRESSABLE ACCESS
 name=IntentionalCrashPluginTest.plugin_client.cc
 npapi_test_plugin.dll!NP_Initialize
 ...
 *!content::PluginLib::NP_Initialize
 *!content::PluginThread::PluginThread
 *!content::PluginMain
 
 UNADDRESSABLE ACCESS
 name=http://crbug.com/313788
@@ skipping 178 matching lines @@
 UNADDRESSABLE ACCESS
 name=http://crbug.com/484352b
 ...
 blink_web.dll!blink::WebFrameWidgetImpl::setRootGraphicsLayer
 blink_web.dll!blink::ChromeClientImpl::attachRootGraphicsLayer
 *.dll!blink::DeprecatedPaintLayerCompositor::detachRootLayer
 
 HANDLE LEAK
 name=http://crbug.com/487500
 system call NtCreateEvent
-...
-v8.dll!v8::base::Mutex::Lock
-base.dll!base::`anonymous namespace'::WorkItemCallback
-ntdll.dll!vsnprintf
-ntdll.dll!TpCallbackIndependent
+ntdll.dll!RtlDosPathNameToNtPathName_U_WithStatus
+ntdll.dll!RtlDosPathNameToNtPathName_U_WithStatus
+ntdll.dll!RtlIntegerToUnicodeString