webkitpy: Small changes to merging script

testing/buildbot/chromium.fyi.json

 {
   "Android Asan Builder Tests (dbg)": {
     "gtest_tests": [
       {
         "args": [
           "--tool=asan"
         ],
         "swarming": {
           "can_use_on_swarming_builders": false
         },
@@ skipping 12892 matching lines @@
         },
         "test": "wtf_unittests"
       }
     ]
   },
   "WebKit Linux - RandomOrder": {
     "isolated_scripts": [
       {
         "isolate_name": "webkit_layout_tests_exparchive",
         "merge": {
+          "args": [
+            "--verbose",
+            "--results-json-override-with-build-property",
+            "build_number",
+            "buildnumber",
+            "--results-json-override-with-build-property",
+            "builder_name",
+            "buildername",
+            "--results-json-override-with-build-property",
+            "chromium_revision",
+            "got_revision_cp"
+          ],

[Dirk Pranke, 2017/04/02 22:56:52]

Why did you make these all arguments, rather than just hardcoding the logic in
the merge script? The merge script only has one purpose, so it seems like
there's no need for the configurability?

           "script": "//third_party/WebKit/Tools/Scripts/merge-layout-test-results"
         },
         "name": "webkit_layout_tests_exparchive",
         "results_handler": "layout tests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
               "os": "Ubuntu-14.04"
             }
           ],
-          "shards": 10
+          "shards": 20
         }
       }
     ]
   },
   "WebKit Mac - RandomOrder": {
     "isolated_scripts": [
       {
         "isolate_name": "webkit_layout_tests_exparchive",
         "name": "webkit_layout_tests_exparchive",
         "swarming": {
@@ skipping 248 matching lines @@
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": false
         },
         "test": "views_unittests"
       }
     ]
   }
 }