Roll src/third_party/catapult/ 7d41d5873..cc78bd596 (4 commits).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/7d41d5873cc4..cc78bd596aa7

$ git log 7d41d5873..cc78bd596 --date=short --no-merges --format='%ad %ae %s'
2016-09-20 benjhayden Add tr.v.d.Scalar
2016-09-20 nednguyen Add script for slimming trace file
2016-09-20 alexandermont Put all power metrics in one file.
2016-09-20 charliea Fix more camelcase violations in tracing/

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=catapult-sheriff@chromium.org

Review-Url: https://codereview.chromium.org/2357493003
Cr-Commit-Position: refs/heads/master@{#419862}

DEPS

@@ -92,7 +92,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
-  'catapult_revision': '7d41d5873cc4b63431e1a95580c6396a90700bdc',
+  'catapult_revision': 'cc78bd596aa74d212fd121e709a2e99404690559',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.