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

tools/valgrind/drmemory/suppressions_full.txt

Index: tools/valgrind/drmemory/suppressions_full.txt
diff --git a/tools/valgrind/drmemory/suppressions_full.txt b/tools/valgrind/drmemory/suppressions_full.txt
index 722ef5f26301deb0764d569b9f4836114e29e157..61e043b753657f97dfa9772b194918f3e51f7c7d 100644
--- a/tools/valgrind/drmemory/suppressions_full.txt
+++ b/tools/valgrind/drmemory/suppressions_full.txt
@@ -2112,3 +2112,14 @@ base.dll!base::WaitableEvent::WaitableEvent
 gpu.dll!gpu::InProcessCommandBuffer::Initialize
 gl_in_process_context.dll!gpu::`anonymous namespace'::GLInProcessContextImpl::Initialize
 gl_in_process_context.dll!gpu::GLInProcessContext::CreateContext
+
+# 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