Implement nacl_irt_clock for non-sfi mode.

This CL implements nacl_irt_clock on non-sfi mode,
which is simply proxying to the glibc implementation.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3734
TEST=Tried to call a newly added function from plugin via AT_SYSINFO.

Review URL: https://codereview.chromium.org/139303003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245459 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245459
cc: Add zero-copy texture update support to delegating renderer.

This adds necessary BindTexImage/ReleaseTexImage calls to
ResourceProvider::TransferResource.

BUG=334747

Review URL: https://codereview.chromium.org/132873006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@245460 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 245460