aw: Fix detach and destroy interaction

android_webview/javatests/src/org/chromium/android_webview/test/AwContentsTest.java

Index: android_webview/javatests/src/org/chromium/android_webview/test/AwContentsTest.java
diff --git a/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsTest.java b/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsTest.java
index 10ee78072561fe6e1957f838984df18337cdc12f..01a52a33feaeca33668d2e8bbee80c93678b0fc2 100644
--- a/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsTest.java
+++ b/android_webview/javatests/src/org/chromium/android_webview/test/AwContentsTest.java
@@ -136,6 +136,25 @@ public class AwContentsTest extends AwTestBase {
         });
     }
 
+    @SmallTest
+    @Feature({"AndroidWebView"})
+    public void testUseAwSettingsAfterDestroy() throws Throwable {
+        AwTestContainerView awTestContainerView =
+                createAwTestContainerViewOnMainSync(mContentsClient);
+        AwSettings awSettings = getAwSettingsOnUiThread(awTestContainerView.getAwContents());
+        loadUrlSync(awTestContainerView.getAwContents(),
+                mContentsClient.getOnPageFinishedHelper(), CommonResources.ABOUT_HTML);
+        destroyAwContentsOnMainSync(awTestContainerView.getAwContents());
+
+        // AwSettings should still be usable even after native side is destroyed.
+        String newFontFamily = "serif";
+        awSettings.setStandardFontFamily(newFontFamily);
+        assertEquals(newFontFamily, awSettings.getStandardFontFamily());
+        boolean newBlockNetworkLoads = !awSettings.getBlockNetworkLoads();
+        awSettings.setBlockNetworkLoads(newBlockNetworkLoads);
+        assertEquals(newBlockNetworkLoads, awSettings.getBlockNetworkLoads());
+    }
+
     private int callDocumentHasImagesSync(final AwContents awContents)
             throws Throwable, InterruptedException {
         // Set up a container to hold the result object and a semaphore to