Report known bisect results at the end of each step. This will allow jobs that fail unexpectedly to be easily resubmitted with a reduced range by perf sheriffs.

Example output:

@@@SEED_STEP Working on [519ed0d5835fc914eb6d320eb7f4e0dbd3c60c8d]@@@
@@@STEP_CURSOR Working on [519ed0d5835fc914eb6d320eb7f4e0dbd3c60c8d]@@@
@@@STEP_STARTED@@@

Working on revision: [519ed0d5835fc914eb6d320eb7f4e0dbd3c60c8d]

Partial results:
         Depot                         Commit SHA                     Mean       Std. Error       State    
        chromium        400664c4101576b48e30da67d57ecffc4d83fcb0      0.00         +-0.00          Bad     
        chromium        fc062604f35d88e607e36ae5f91d19d7cb2251a2      0.00         +-0.00          Bad     
        chromium        1ce4152989e2d33fa10278b4f20267afa70d6be3      0.00         +-0.00          Bad     
        chromium        519ed0d5835fc914eb6d320eb7f4e0dbd3c60c8d      0.00         +-0.00          Bad     

        chromium        481936425a29b2ef6796a1185a8f9008c282b346      0.00         +-0.00          Good    

@@@STEP_CLOSED@@@


BUG=331802
NOTRY=true

Review URL: https://codereview.chromium.org/122613004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243200 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243200
Metrics fix for data reduction proxy.

Refactors histogram increments into virtual methods for mocking.

Adds unit tests that expect the correct metrics calls.

Fixes timing of RecordDataReductionInit() so that it happens when the
proxy is unavailable.


BUG=328579

Review URL: https://codereview.chromium.org/111113006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243201 0039d316-1c4b-4281-b951-d872f2087c98
TSAN: Disable failing EmbeddedTestServerThreadingTestInstantiation tests.
Valgrind: Remove obsolete suppressions.

BUG=147755,310348
NOTRY=true
TBR=timurrrr@chromium.org

Review URL: https://codereview.chromium.org/122313006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243202 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 243202