[WebView] Update CTS logic to load test name from json.

scripts/slave/recipe_modules/chromium_android/example.expected/webview_cts_invalid_platform.json

Index: scripts/slave/recipe_modules/chromium_android/example.expected/webview_cts_invalid_platform.json
diff --git a/scripts/slave/recipe_modules/chromium_android/example.expected/tester_with_step_warning.json b/scripts/slave/recipe_modules/chromium_android/example.expected/webview_cts_invalid_platform.json
similarity index 96%
copy from scripts/slave/recipe_modules/chromium_android/example.expected/tester_with_step_warning.json
copy to scripts/slave/recipe_modules/chromium_android/example.expected/webview_cts_invalid_platform.json
index ac910624fa15c603e1d436fa2aff878c6bb3637c..41222f82b31ee16fd2ddf92e0b286a9db127f90e 100644
--- a/scripts/slave/recipe_modules/chromium_android/example.expected/tester_with_step_warning.json
+++ b/scripts/slave/recipe_modules/chromium_android/example.expected/webview_cts_invalid_platform.json
@@ -798,16 +798,58 @@
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
-    "name": "unittests",
-    "~followup_annotations": [
-      "step returned non-zero exit code: 88",
-      "@@@STEP_WARNINGS@@@"
-    ]
+    "name": "unittests"
+  },
+  {
+    "cmd": [
+      "[SLAVE_BUILD]/src/tools/prepare-bisect-perf-regression.py",
+      "-w",
+      "[SLAVE_BUILD]"
+    ],
+    "name": "prepare bisect perf regression"
+  },
+  {
+    "cmd": [
+      "[SLAVE_BUILD]/src/tools/run-bisect-perf-regression.py",
+      "-w",
+      "[SLAVE_BUILD]",
+      "--extra_src",
+      "test.py",
+      "--path_to_config",
+      "test.py"
+    ],
+    "name": "run bisect perf regression"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "[SLAVE_BUILD]/src/build/android/adb_command_line.py",
+      "--adb-path",
+      "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools/adb",
+      "--device-path",
+      "/data/local/tmp/webview-command-line",
+      "--executable",
+      "webview",
+      "--webview_arg_1",
+      "--webview_arg_2"
+    ],
+    "name": "write webview command line file"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
+      "[SLAVE_BUILD]/src/android_webview/tools/cts_config/webview_cts_gcs_path.json",
+      "/path/to/tmp/"
+    ],
+    "name": "Fetch CTS filename data"
   },
   {
     "name": "$result",
-    "reason": "Warning: Step('unittests') returned 88",
+    "reason": "No CTS test found to use for arch:arm_64 android:L",
     "recipe_result": null,
-    "status_code": 88
+    "status_code": 1
   }
 ]