Use validating form of IPC enum macros for audio messages.

This is part of a long-running background task to remove the remaining
uses of the unchecked IPC_ENUM_TRAITS() macro.

BUG=246708

Review URL: https://codereview.chromium.org/150983007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249751 0039d316-1c4b-4281-b951-d872f2087c98
Use validating form of IPC enum macros for video capture messages.

This is part of a long-running background task to remove the remaining
uses of the unchecked IPC_ENUM_TRAITS() macro.

BUG=246708

Review URL: https://codereview.chromium.org/156993005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249752 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249751
SVN changes up to revision 249752
Widen ChromeBlacklistTrialTest.* exclusion to all sub-tests for Dr. Memory.

BUG=340837
TBR=zhaoqin@chromium.org

Review URL: https://codereview.chromium.org/153353004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249753 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 249753