Don't use select() in SyncSocket when handle > FD_SETSIZE.

base/sync_socket_posix.cc

Index: base/sync_socket_posix.cc
diff --git a/base/sync_socket_posix.cc b/base/sync_socket_posix.cc
index c408de52238e90bbd7a76a927d5c65bedd32beb7..ba843608319a002aa622afea362e54edb24a6e5b 100644
--- a/base/sync_socket_posix.cc
+++ b/base/sync_socket_posix.cc
@@ -125,7 +125,13 @@ size_t SyncSocket::ReceiveWithTimeout(void* buffer,
   DCHECK_GT(length, 0u);
   DCHECK_LE(length, kMaxMessageLength);
   DCHECK_NE(handle_, kInvalidHandle);
-  CHECK_LT(handle_, FD_SETSIZE);
+
+  // TODO(dalecurtis): There's an undiagnosed issue on OSX where we're seeing
+  // large numbers of open files which prevents select() from being used.  In
+  // this case, the best we can do is Peek() to see if we can Receive() now or
+  // return a timeout error (0) if not.  See http://crbug.com/314364.
+  if (handle_ >= FD_SETSIZE)
+    return Peek() < length ? 0 : Receive(buffer, length);
 
   // Only timeouts greater than zero and less than one second are allowed.
   DCHECK_GT(timeout.InMicroseconds(), 0);