Convert Coverage flavor and bot to Swarming

scripts/slave/recipe_modules/skia/api.py

Index: scripts/slave/recipe_modules/skia/api.py
diff --git a/scripts/slave/recipe_modules/skia/api.py b/scripts/slave/recipe_modules/skia/api.py
index 393017b205d2055521f9dcd7a59b06039f936da8..10c953e40515a2cda7c2da58e458e5645c586f53 100644
--- a/scripts/slave/recipe_modules/skia/api.py
+++ b/scripts/slave/recipe_modules/skia/api.py
@@ -395,18 +395,6 @@ for pattern in build_products_whitelist:
       if fail_build_on_failure:
         self.failed.append(e)
 
-  def gsutil_upload(self, name, source, bucket, dest):
-    """Upload to Google Storage without using a .boto file."""
-    self.run(
-        self.m.gsutil.upload,
-        name,
-        source=source,
-        bucket=bucket,
-        dest=dest,
-        args=['-R'],
-        env=self.gsutil_env_skia_infra,
-        abort_on_failure=False)
-
   def download_dir(self, version_file, gs_path_tmpl, tmp_dir, host_path,
                    test_expected_version, test_actual_version,
                    running_in_swarming):