Bug 1393326 - Enable runByManifest for Android mochitests and run Android mochitest-chrome in more chunks; r=jmaher

taskcluster/ci/test/mochitest.yml

@@ -167,8 +167,8 @@ mochitest-chrome:
             default: default
     chunks:
         by-test-platform:
-            android-4.3-arm7-api-16/debug: 4
-            android.*: 2
+            android-4.3-arm7-api-16/debug: 8
+            android.*: 4
             default: 3
     max-run-time: 3600
     e10s: false

testing/mochitest/runtestsremote.py

@@ -319,7 +319,7 @@ def run_test_harness(parser, options):
     if options is None:
         raise ValueError("Invalid options specified, use --help for a list of valid options")
 
-    options.runByManifest = False
+    options.runByManifest = True
     # roboextender is used by mochitest-chrome tests like test_java_addons.html,
     # but not by any plain mochitests
     if options.flavor != 'chrome':