Do not send the OnWindowShowTypeChanged() notification if the window show type has not changed

BUG=None
TEST=None

Review URL: https://codereview.chromium.org/99303006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240151 0039d316-1c4b-4281-b951-d872f2087c98
Add description of metric counting NSS nickname to PEM migrations.

The UMA counter ("Network.MigrationNssToPem") is already in place at network_cert_migrator.cc:96, but the entry in the histograms.xml was still missing.

BUG=263044

Review URL: https://codereview.chromium.org/111973006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240152 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240152
UDP NetConnectivity tests - added read/write states to handle pending
read/writes.

- During read(), if socket_ returns ERR_IO_PENDING, set read_state_ to
  READ_STATE_PENDING and avoid further read() until OnReadComplete
  is called.

- During write(), if socket_ returns ERR_IO_PENDING, set write_state_
  to WRITE_STATE_ABORT_IN_PROGRESS. Cancel the pending read() and
  write(). Stop performing any more tests.

This change fixes use after free of write_buffer_.

BUG=273917
R=jar@chromium.org

Review URL: https://codereview.chromium.org/102993007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@240153 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 240153