Add web support for getting the server_auth_code field

.ci.yaml

@@ -0,0 +1,16 @@
+# Describes the targets run in continuous integration environment.
+#
+# Flutter infra uses this file to generate a checklist of tasks to be performed
+# for every commit.
+#
+# More information at:
+#  * https://github.com/flutter/cocoon/blob/master/scheduler/README.md
+enabled_branches:
+  - master
+
+targets:
+  - name: Windows Plugins
+    builder: Windows Plugins
+    postsubmit: false
+    scheduler: luci
+

.ci/Dockerfile

@@ -6,7 +6,7 @@ RUN sudo apt-get install -y --no-install-recommends gnupg
 
 # Add repo for gcloud sdk and install it
 RUN echo "deb [signed-by=/usr/share/keyrings/cloud.google.gpg] https://packages.cloud.google.com/apt cloud-sdk main" | \
-    sudo tee -a /etc/apt/sources.list.d/google-cloud-sdk.list 
+    sudo tee -a /etc/apt/sources.list.d/google-cloud-sdk.list
 
 RUN curl https://packages.cloud.google.com/apt/doc/apt-key.gpg | \
     sudo apt-key --keyring /usr/share/keyrings/cloud.google.gpg add -
@@ -23,7 +23,21 @@ RUN yes | sdkmanager \
 
 RUN yes | sdkmanager --licenses
 
+# Install formatter.
+RUN sudo apt-get install -y clang-format
+
+# Install xvfb to allow running headless
+RUN sudo apt-get install -y xvfb libegl1-mesa
+# Install Linux desktop build tool requirements.
+RUN sudo apt-get install -y clang cmake ninja-build file pkg-config
+# Install necessary libraries.
+RUN sudo apt-get install -y libgtk-3-dev libblkid-dev liblzma-dev libgcrypt20-dev
+
 # Add repo for Google Chrome and install it
 RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
 RUN echo 'deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main' | sudo tee /etc/apt/sources.list.d/google-chrome.list
 RUN sudo apt-get update && sudo apt-get install -y --no-install-recommends google-chrome-stable
+
+# Make Chrome the default so http: has a handler for url_launcher tests.
+RUN sudo apt-get install -y xdg-utils
+RUN xdg-settings set default-web-browser google-chrome.desktop