Suppress uninitialized reads in IPC::Channel::ChannelImpl::ProcessOutgoingMessages while we analyze them.

BUG=371991
TBR=zhaoqin@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/274193003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269656 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/tools/valgrind/drmemory/suppressions_full.txt b/tools/valgrind/drmemory/suppressions_full.txt
index 0600ee36..b23842c 100644
--- a/tools/valgrind/drmemory/suppressions_full.txt
+++ b/tools/valgrind/drmemory/suppressions_full.txt
@@ -2142,3 +2142,14 @@
 content.dll!jingle_glue::JingleThreadWrapper::Send
 content.dll!webrtc::PeerConnectionFactory::CreatePeerConnection
 content.dll!webrtc::PeerConnectionFactoryInterface::CreatePeerConnection
+
+# This suppression is deliberately general, as bugs reported in
+# ProcessOutgoingMessages are difficult to track down until we
+# get our annotations in place.
+# TODO(bruening): add annotations once we have the infrastructure.
+UNINITIALIZED READ
+name=bug_371991
+system call NtWriteFile parameter #5
+KERNELBASE.dll!WriteFile
+KERNEL32.dll!WriteFile
+ipc.dll!IPC::Channel::ChannelImpl::ProcessOutgoingMessages