Add ContentViewDelegate

android_webview/java/src/org/chromium/android_webview/AwWebContentsIoThreadDelegate.java

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.android_webview;
+
+import org.chromium.base.CalledByNative;
+
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Delegate for URLRequest intercepting.
+ *
+ * The shouldInterceptRequest method will be called on the IO thread.
+ * You should create a separate instance of this class for every WebContents that requires the
+ * provided functionality.
+ */
+public class AwContentsIoThreadDelegate {
+    public interface AwContentsIoThreadDelegateImpl {
+        InterceptedRequestData shouldInterceptRequest(String url);
+    }
+    private AtomicReference<AwContentsIoThreadDelegateImpl> mImpl =
+            new AtomicReference<AwContentsIoThreadDelegateImpl>();
+
+    public ContentViewIoThreadDelegate(int nativeWebContents,
+                                       AwContentsIoThreadDelegateImpl impl) {
+        mImpl.set(impl);
+        nativeInit(nativeWebContents);
+    }
+
+    @CalledByNative
+    private InterceptedRequestData shouldInterceptRequest(String url) {
+        AwContentsIoThreadDelegateImpl impl = mImpl.get();
+        if (impl == null) {
+            return null;
+        } else {
+            return impl.shouldInterceptRequest(url);
+        }
+    }
+
+    @CalledByNative
+    private void onWebContentsDestroyed() {
+        mImpl.set(null);
+    }
+
+    private native void nativeInit(int webContents);
+}