[webcrypto] Add raw symmetric key RSAES-PKCS1-v1_5 wrap/unwrap for NSS.

BUG=245025
TEST=content_unittests --gtest_filter="SharedCryptoTest*"

Based on https://codereview.chromium.org/118623002/

Review URL: https://codereview.chromium.org/188363002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256779 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256779
Add metrics to track the duration of tracks received over a PeerConnection.

NOTRY=true
TBR=jochen@chromium.org
BUG=348616

Review URL: https://codereview.chromium.org/183973021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256780 0039d316-1c4b-4281-b951-d872f2087c98
Use generate_stubs.py for VAAPI symbols and remove VAAPI < 0.34 TODO.
    
VAAPI on ChromeOS is updated to 0.34, so remove the vaCreateSurfaces() TODO.
And use generate_stubs.py for simplify.
    
BUG=None
TEST=content_shell and chrome to view H264 oneline videos.

Review URL: https://codereview.chromium.org/179543002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256781 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256781
[IME] When hiding input view, the lock state should be cleared.

BUG=351637
TEST=None

Review URL: https://codereview.chromium.org/196853002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256782 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256782