Use download-chrome.sh to download Chrome on Windows too.

wget that ships with MSYS needs `--no-check-certificate` otherwise it fails for SNI.

Also, specified `-q` so that the output isn't bloated.

appveyor.yml

@@ -17,9 +17,9 @@ install:
   - npm run install-all
 
 before_test:
-  - set LIGHTHOUSE_CHROMIUM_PATH=%CD%\chrome-win32\chrome.exe
-  - appveyor DownloadFile https://download-chromium.appspot.com/dl/Win?type=snapshots -FileName chrome-win32.zip
-  - unzip chrome-win32.zip
+  - set "PATH=C:\MinGW\msys\1.0\bin;%PATH%"
+  - set "LIGHTHOUSE_CHROMIUM_PATH=%CD%\chrome-win32\chrome.exe"
+  - bash ./lighthouse-core/scripts/download-chrome.sh
   - npm run build-cli
   - npm run build-extension
   - npm run build-viewer
@@ -27,7 +27,6 @@ before_test:
 test_script:
   - node --version
   - npm --version
-  - set "PATH=C:\MinGW\msys\1.0\bin;%PATH%"
   - npm run lint
   - npm run unit
   - npm run smoke

lighthouse-core/scripts/download-chrome.sh

@@ -2,15 +2,19 @@
 
 # Download chrome inside of our CI env.
 
-if [ x"$LIGHTHOUSE_CHROMIUM_PATH" == x ]
-then
+if [ "$APPVEYOR" == "True" ]; then
+  url="https://download-chromium.appspot.com/dl/Win?type=snapshots"
+else
+  url="https://download-chromium.appspot.com/dl/Linux_x64?type=snapshots"
+fi
+
+if [ x"$LIGHTHOUSE_CHROMIUM_PATH" == x ]; then
   echo "Error: Environment variable LIGHTHOUSE_CHROMIUM_PATH not set"
   exit 1
 fi
 
-if [ -e "$LIGHTHOUSE_CHROMIUM_PATH" ]
-then
+if [ -e "$LIGHTHOUSE_CHROMIUM_PATH" ]; then
   echo "cached chrome found"
 else
-  wget 'https://download-chromium.appspot.com/dl/Linux_x64?type=snapshots' -O chrome.zip && unzip chrome.zip
+  wget "$url" --no-check-certificate -q -O chrome.zip && unzip chrome.zip
 fi