Revert "getCacheFileBaseDir() should return null when disabled."

This is no longer needed as the CacheManager should always be enabled.

This reverts commit ded09b59f283386d920cb14a9597c38b289383c9.

Bug: 3270236
Change-Id: I29516f452c963552f33be8011350afdf44c99948
diff --git a/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java b/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java
index 573d4d5..e2b90b6 100644
--- a/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java
+++ b/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java
@@ -62,11 +62,7 @@
         args = {}
     )
     public void testGetCacheFileBaseDir() {
-        if (CacheManager.cacheDisabled()) {
-            assertNull(CacheManager.getCacheFileBaseDir());
-        } else {
-            assertTrue(CacheManager.getCacheFileBaseDir().exists());
-        }
+        assertTrue(CacheManager.getCacheFileBaseDir().exists());
     }
 
     @TestTargets({