Deleted OS_WIN and all Windows specific files from base.

base/test/test_timeouts.cc

Index: base/test/test_timeouts.cc
diff --git a/base/test/test_timeouts.cc b/base/test/test_timeouts.cc
index b30d6c34aac7366f065add222ceea8352dc65abb..23df69e1d83a420bf1a72c13bb6b5c6434c47319 100644
--- a/base/test/test_timeouts.cc
+++ b/base/test/test_timeouts.cc
@@ -20,10 +20,6 @@ namespace {
 // For MSan the slowdown depends heavily on the value of msan_track_origins GYP
 // flag. The multiplier below corresponds to msan_track_origins=1.
 static const int kTimeoutMultiplier = 6;
-#elif defined(ADDRESS_SANITIZER) && defined(OS_WIN)
-// Asan/Win has not been optimized yet, give it a higher
-// timeout multiplier. See http://crbug.com/412471
-static const int kTimeoutMultiplier = 3;
 #elif defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) || \
     defined(SYZYASAN)
 static const int kTimeoutMultiplier = 2;