DevTools: Fixed range of ports available for tethering

1024 is the first port that doesn't require priveleged access and 32767 is the last port that isn't used as ephemeral.

BUG=409658

Review URL: https://codereview.chromium.org/529913003

Cr-Commit-Position: refs/heads/master@{#292912}

content/browser/devtools/tethering_handler.cc

@@ -35,8 +35,8 @@ const char kLocalhost[] = "127.0.0.1";
 const int kListenBacklog = 5;
 const int kBufferSize = 16 * 1024;
 
-const int kMinTetheringPort = 5000;
-const int kMaxTetheringPort = 10000;
+const int kMinTetheringPort = 1024;
+const int kMaxTetheringPort = 32767;
 
 class SocketPump : public net::StreamListenSocket::Delegate {
  public: