Kokoro: adds the Ninja from DEPS to the PATH on Windows

Change-Id: I8667b7e74db2bee7bf7a6751e7e76e33bdf2d03c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/117891
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
diff --git a/infra/kokoro/windows/build.bat b/infra/kokoro/windows/build.bat
index c61b8c3..0de7b53 100644
--- a/infra/kokoro/windows/build.bat
+++ b/infra/kokoro/windows/build.bat
@@ -44,8 +44,8 @@
 
 set ORIGINAL_SRC_DIR= %~dp0\..\..\..
 set TEMP_DIR=%TEMP%\dawn-temp
-set SRC_DIR="%TEMP_DIR%\dawn-src"
-set BUILD_DIR="%TEMP_DIR%\dawn-build"
+set SRC_DIR=%TEMP_DIR%\dawn-src
+set BUILD_DIR=%TEMP_DIR%\dawn-build
 
 cd /d %ORIGINAL_SRC_DIR%
 if not exist ".git\" (
@@ -92,17 +92,6 @@
 @echo off
 popd
 
-@REM Install Ninja after depot_tools to make sure it's in PATH before depot_tools
-call :status "Fetching and installing Ninja"
-@echo on
-@REM set WINSDK_DLL_INSTALLER=https://go.microsoft.com/fwlink/?linkid=2164145
-@REM set WINSDK_VERSION=10.0.20348.0
-set NINJA_ZIP=https://github.com/ninja-build/ninja/releases/download/v1.11.1/ninja-win.zip
-curl -k -L %NINJA_ZIP% --output "%TEMP_DIR%\ninja.zip" || goto :error
-powershell.exe -Command "Expand-Archive -LiteralPath '%TEMP_DIR%\ninja.zip' -DestinationPath '%TEMP_DIR%\ninja'" || goto :error
-set PATH=%TEMP_DIR%\ninja;%PATH%
-@echo off
-
 call :status "Cloning to clean source directory"
 @echo on
 mkdir %SRC_DIR% || goto :error
@@ -116,6 +105,11 @@
 call gclient sync || goto :error
 @echo off
 
+call :status "Adding the Ninja from DEPS to the PATH"
+@echo on
+set PATH=%SRC_DIR%\third_party\ninja;%PATH%
+@echo off
+
 call :status "Configuring build system"
 @echo on
 mkdir %BUILD_DIR%