Revert "Allow CacheManager to be initially disabled."

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

This reverts commit 0dee316c165ec017d0456eb7fa041a839ef72190.

Bug: 3270236
Change-Id: I481dcd6a81c600f67ddac7000dd8b109d1d96866
diff --git a/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java b/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java
index e2b90b6..268256e 100644
--- a/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java
+++ b/tests/tests/webkit/src/android/webkit/cts/CacheManagerTest.java
@@ -122,17 +122,23 @@
             @Override
             protected boolean check() {
                 CacheResult result = CacheManager.getCacheFile(url, null);
-                if (CacheManager.cacheDisabled()) {
-                    // Cache is disabled, so the URL should not have been added.
-                    return result == null;
-                } else {
-                    // Cache enabled, so the last URL loaded should be there.
-                    return result != null;
-                }
+                return result != null;
             }
         }.run();
     }
 
+    @TestTargetNew(
+        level = TestLevel.PARTIAL,
+        method = "cacheDisabled",
+        args = {}
+    )
+    public void testCacheDisabled() {
+        assertFalse(CacheManager.cacheDisabled());
+
+        // Because setCacheDisabled is package private, we can not call it.
+        // cacheDisabled() always return false. How to let it return true?
+    }
+
     private void loadUrl(String url){
         mWebView.loadUrl(url);
         // check whether loadURL successfully
diff --git a/tests/tests/webkit/src/android/webkit/cts/CacheManager_CacheResultTest.java b/tests/tests/webkit/src/android/webkit/cts/CacheManager_CacheResultTest.java
index ffb2b60..1a18a86 100644
--- a/tests/tests/webkit/src/android/webkit/cts/CacheManager_CacheResultTest.java
+++ b/tests/tests/webkit/src/android/webkit/cts/CacheManager_CacheResultTest.java
@@ -148,30 +148,26 @@
         final long time = System.currentTimeMillis();
         loadUrl(url);
         CacheResult result = CacheManager.getCacheFile(url, null);
-        if (CacheManager.cacheDisabled()) {
-            assertNull(result);
-        } else {
-            assertNotNull(result);
-            assertNotNull(result.getInputStream());
-            assertTrue(result.getContentLength() > 0);
-            assertNull(result.getETag());
-            assertEquals(time - age,
-                    DateUtils.parseDate(result.getLastModified()).getTime(), tolerance);
-            File file = new File(CacheManager.getCacheFileBaseDir().getPath(), result.getLocalPath());
-            assertTrue(file.exists());
-            assertNull(result.getLocation());
-            assertEquals("text/html", result.getMimeType());
-            assertNull(result.getOutputStream());
-            assertEquals(time + validity, result.getExpires(), tolerance);
-            assertEquals(HttpStatus.SC_OK, result.getHttpStatusCode());
-            assertNotNull(result.getEncoding());
+        assertNotNull(result);
+        assertNotNull(result.getInputStream());
+        assertTrue(result.getContentLength() > 0);
+        assertNull(result.getETag());
+        assertEquals(time - age,
+                DateUtils.parseDate(result.getLastModified()).getTime(), tolerance);
+        File file = new File(CacheManager.getCacheFileBaseDir().getPath(), result.getLocalPath());
+        assertTrue(file.exists());
+        assertNull(result.getLocation());
+        assertEquals("text/html", result.getMimeType());
+        assertNull(result.getOutputStream());
+        assertEquals(time + validity, result.getExpires(), tolerance);
+        assertEquals(HttpStatus.SC_OK, result.getHttpStatusCode());
+        assertNotNull(result.getEncoding());
 
-            result.setEncoding("iso-8859-1");
-            assertEquals("iso-8859-1", result.getEncoding());
+        result.setEncoding("iso-8859-1");
+        assertEquals("iso-8859-1", result.getEncoding());
 
-            result.setInputStream(null);
-            assertNull(result.getInputStream());
-        }
+        result.setInputStream(null);
+        assertNull(result.getInputStream());
     }
 
     private void loadUrl(String url){