Run RetraceBinaryCompatibilityTests on windows

Bug: 198416916
Change-Id: I1411d4129bff6b4ce0d54f97cbdb70d9ad65cf52
diff --git a/src/test/java/com/android/tools/r8/retrace/api/RetraceApiBinaryCompatibilityTest.java b/src/test/java/com/android/tools/r8/retrace/api/RetraceApiBinaryCompatibilityTest.java
index dbfc2cc..2c52863 100644
--- a/src/test/java/com/android/tools/r8/retrace/api/RetraceApiBinaryCompatibilityTest.java
+++ b/src/test/java/com/android/tools/r8/retrace/api/RetraceApiBinaryCompatibilityTest.java
@@ -76,7 +76,6 @@
 
   @Test
   public void runCheckedInBinaryJar() throws Exception {
-    Assume.assumeFalse(ToolHelper.isWindows());
     for (CfRuntime cfRuntime : CfRuntime.getCheckedInCfRuntimes()) {
       RetraceApiTestHelper.runJunitOnTests(
           cfRuntime,
diff --git a/src/test/java/com/android/tools/r8/retrace/api/RetraceApiTestHelper.java b/src/test/java/com/android/tools/r8/retrace/api/RetraceApiTestHelper.java
index 9b2f67d..a1049f1 100644
--- a/src/test/java/com/android/tools/r8/retrace/api/RetraceApiTestHelper.java
+++ b/src/test/java/com/android/tools/r8/retrace/api/RetraceApiTestHelper.java
@@ -69,7 +69,7 @@
 
   private static Path getJunitDependency() {
     String junitPath =
-        Arrays.stream(System.getProperty("java.class.path").split(":"))
+        Arrays.stream(System.getProperty("java.class.path").split(File.pathSeparator))
             .filter(cp -> cp.endsWith(JUNIT_JAR))
             .collect(Collectors.toSingle());
     return Paths.get(junitPath);
@@ -77,7 +77,7 @@
 
   private static Path getHamcrest() {
     String junitPath =
-        Arrays.stream(System.getProperty("java.class.path").split(":"))
+        Arrays.stream(System.getProperty("java.class.path").split(File.pathSeparator))
             .filter(cp -> cp.endsWith(HAMCREST))
             .collect(Collectors.toSingle());
     return Paths.get(junitPath);