Remove Windows support from the EDK.

mojo/edk/system/message_pipe_dispatcher_unittest.cc

Index: mojo/edk/system/message_pipe_dispatcher_unittest.cc
diff --git a/mojo/edk/system/message_pipe_dispatcher_unittest.cc b/mojo/edk/system/message_pipe_dispatcher_unittest.cc
index aebc439b679193a6d6fe37da1f906918884aad61..a0eca42cadeb8e4a404bf01b310395b75c3df51f 100644
--- a/mojo/edk/system/message_pipe_dispatcher_unittest.cc
+++ b/mojo/edk/system/message_pipe_dispatcher_unittest.cc
@@ -338,13 +338,7 @@ TEST(MessagePipeDispatcherTest, BasicClosed) {
   }
 }
 
-#if defined(OS_WIN)
-// http://crbug.com/396386
-#define MAYBE_BasicThreaded DISABLED_BasicThreaded
-#else
-#define MAYBE_BasicThreaded BasicThreaded
-#endif
-TEST(MessagePipeDispatcherTest, MAYBE_BasicThreaded) {
+TEST(MessagePipeDispatcherTest, BasicThreaded) {
   test::Stopwatch stopwatch;
   int32_t buffer[1];
   const uint32_t kBufferSize = static_cast<uint32_t>(sizeof(buffer));