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

BUG=314364
TEST=audio playback still works, just glitches in 48->44
R=ajwong@chromium.org

Review URL: https://codereview.chromium.org/49303008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232845 0039d316-1c4b-4281-b951-d872f2087c98

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);