android webview: setShouldReuseGlobalForUnownedMainFrame

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

Index: android_webview/javatests/src/org/chromium/android_webview/test/AwSettingsTest.java
diff --git a/android_webview/javatests/src/org/chromium/android_webview/test/AwSettingsTest.java b/android_webview/javatests/src/org/chromium/android_webview/test/AwSettingsTest.java
index ffcd210b0b2222443fb9b51915527143223eef65..fa5c1107572d06f60c55d7540f41f46a02c4a153 100644
--- a/android_webview/javatests/src/org/chromium/android_webview/test/AwSettingsTest.java
+++ b/android_webview/javatests/src/org/chromium/android_webview/test/AwSettingsTest.java
@@ -27,6 +27,7 @@ import org.chromium.android_webview.AwSettings;
 import org.chromium.android_webview.AwWebResourceResponse;
 import org.chromium.android_webview.test.util.CommonResources;
 import org.chromium.android_webview.test.util.ImagePageGenerator;
+import org.chromium.android_webview.test.util.JSUtils;
 import org.chromium.android_webview.test.util.VideoTestUtil;
 import org.chromium.android_webview.test.util.VideoTestWebServer;
 import org.chromium.base.test.util.DisabledTest;
@@ -2873,6 +2874,66 @@ public class AwSettingsTest extends AwTestBase {
         }
     }
 
+    private TestDependencyFactory mOverridenFactory;
+
+    @Override
+    public void tearDown() throws Exception {
+        mOverridenFactory = null;
+        super.tearDown();
+    }
+
+    @Override
+    protected TestDependencyFactory createTestDependencyFactory() {
+        if (mOverridenFactory == null) {
+            return new TestDependencyFactory();
+        } else {
+            return mOverridenFactory;
+        }
+    }
+
+    private static class EmptyDocumentPeristenceTestDependencyFactory
+            extends TestDependencyFactory {
+        private boolean mAllow;
+        public EmptyDocumentPeristenceTestDependencyFactory(boolean allow) {
+            mAllow = allow;
+        }
+
+        @Override
+        public AwSettings createAwSettings(Context context, boolean supportsLegacyQuirks) {
+            return new AwSettings(context, false /* isAccessFromFileURLsGrantedByDefault */,
+                    supportsLegacyQuirks, mAllow);
+        }
+    }
+
+    private void doAllowEmptyDocumentPersistenceTest(boolean allow) throws Throwable {
+        mOverridenFactory = new EmptyDocumentPeristenceTestDependencyFactory(allow);
+
+        final TestAwContentsClient client = new TestAwContentsClient();
+        final AwTestContainerView mContainerView = createAwTestContainerViewOnMainSync(client);
+        final AwContents awContents = mContainerView.getAwContents();
+        enableJavaScriptOnUiThread(awContents);
+        JSUtils.executeJavaScriptAndWaitForResult(this, awContents,
+                client.getOnEvaluateJavaScriptResultHelper(),
+                "window.emptyDocumentPersistenceTest = true;");
+        loadUrlSync(awContents, client.getOnPageFinishedHelper(), "about:blank");
+        String result = JSUtils.executeJavaScriptAndWaitForResult(this, awContents,
+                client.getOnEvaluateJavaScriptResultHelper(),
+                "window.emptyDocumentPersistenceTest ? 'set' : 'not set';");
+        assertEquals(allow ? "\"set\"" : "\"not set\"", result);
+    }
+
+    @SmallTest
+    @Feature({"AndroidWebView", "Preferences"})
+    public void testAllowEmptyDocumentPersistence() throws Throwable {
+        doAllowEmptyDocumentPersistenceTest(true);
+    }
+
+    @SmallTest
+    @Feature({"AndroidWebView", "Preferences"})
+    public void testDisallowEmptyDocumentPersistence() throws Throwable {
+        doAllowEmptyDocumentPersistenceTest(false);
+    }
+
     static class ViewPair {
         private final AwTestContainerView mContainer0;
         private final TestAwContentsClient mClient0;