[ci] Introduce LUCI versions of Linux desktop platform tests

.ci.yaml

@@ -292,8 +292,14 @@ targets:
     properties:
       add_recipes_cq: "true"
       version_file: flutter_master.version
-      target_file: linux_build_all_packages.yaml
+      # DO NOT LAND: For testing
+      target_file: linux_platform_tests.yaml
       channel: master
+      # DO NOT LAND: For testing
+      dependencies: >-
+        [
+          {"dependency": "chrome_and_driver", "version": "version:114.0"}
+        ]
 
   - name: Linux_desktop build_all_packages stable
     recipe: packages/packages
@@ -303,6 +309,25 @@ targets:
       target_file: linux_build_all_packages.yaml
       channel: stable
 
+  - name: Linux_desktop platform_tests master
+    bringup: true # New target
+    recipe: packages/packages
+    timeout: 30
+    properties:
+      version_file: flutter_master.version
+      target_file: linux_platform_tests.yaml
+      channel: master
+
+  - name: Linux_desktop platform_tests stable
+    bringup: true # New target
+    recipe: packages/packages
+    presubmit: false
+    timeout: 30
+    properties:
+      version_file: flutter_stable.version
+      target_file: linux_platform_tests.yaml
+      channel: stable
+
   ### iOS+macOS tasks ###
   # TODO(stuartmorgan): Move this to ARM once google_maps_flutter has ARM
   # support. `pod lint` makes a synthetic target that doesn't respect the

.ci/scripts/set_default_linux_apps.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+# Copyright 2013 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+set -e
+
+xdg-mime default google-chrome.desktop inode/directory
+xdg-settings set default-web-browser google-chrome.desktop

.ci/scripts/xvfb_tool_runner.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+# Copyright 2013 The Flutter Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+set -e
+
+xvfb-run ./script/tool_runner.sh "$@"

.ci/targets/linux_platform_tests.yaml

@@ -0,0 +1,14 @@
+tasks:
+  - name: prepare tool
+    script: .ci/scripts/prepare_tool.sh
+  - name: set default apps
+    script: .ci/scripts/set_default_linux_apps.sh
+  - name: build examples
+    script: script/tool_runner.sh
+    args: ["build-examples", "--linux"]
+  - name: native test
+    script: .ci/scripts/xvfb_tool_runner.sh
+    args: ["native-test", "--linux"]
+  - name: drive examples
+    script: .ci/scripts/xvfb_tool_runner.sh
+    args: ["drive-examples", "--linux", "--exclude=script/configs/exclude_integration_linux.yaml"]