Add base::TimeDelta::Max().

TimeDelta::Max() is a maximum timedelta, larger than any timedelta you
can compare it to. The results of adding it to a time, or another time
delta are undefined.

R=ajwong@chromium.org,mkwst@chromium.org,jar@chromium.org
TBR=jamesr@chomium.org,acolwell@chromium.org,nick@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/163413004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253502 0039d316-1c4b-4281-b951-d872f2087c98
Whitelist cast extension for chromeosInfoPrivate extension api.

BUG=343701

Review URL: https://codereview.chromium.org/171833002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253503 0039d316-1c4b-4281-b951-d872f2087c98
Amend PATH for nacl64 so loader can find x64 CRT

In order to keep from needing to system-install VS runtime DLLs
for debug builds, we put them in the output directory. This
mostly works, except in the case of nacl64 it requires the x64
CRT, but builds into the x86 output directory. The OS loader will
ignore the x86 ones, and continue searching the PATH, so before
launching nacl64.exe, append to PATH to the location of the x64
CRT DLLs.

See linked bug for more details and investigation.

R=cpu@chromium.org, mseaborn@chromium.org
BUG=346034

Review URL: https://codereview.chromium.org/180223004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253504 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253502
Remove unnecessary #include

BUG=none

Review URL: https://codereview.chromium.org/179493003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@253505 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 253505