metrics: Add build ID metadata to perf data protobuf

BUG=none
TEST=build chrome successfully

Change-Id: Icdcfb7ff6e705a181d15eb2c113b404ef98b05ea
Signed-off-by: Simon Que <sque@chromium.org>

Review URL: https://codereview.chromium.org/75463004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256114 0039d316-1c4b-4281-b951-d872f2087c98
Don't leak ExternalInstallDialogDelegate if the owning profile is destroyed.

BUG=346412

Review URL: https://codereview.chromium.org/189003006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@256115 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 256115