[Android WebView] Call shouldInterceptRequest on a background thread

android_webview/java/src/org/chromium/android_webview/AwContentsIoThreadClient.java

 // Copyright 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.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
 
 import java.util.HashMap;
@@ skipping 22 matching lines @@
     @CalledByNative
     public abstract boolean shouldAcceptThirdPartyCookies();
 
     @CalledByNative
     public abstract void onDownloadStart(String url, String userAgent,
             String contentDisposition, String mimeType, long contentLength);
 
     @CalledByNative
     public abstract void newLoginRequest(String realm, String account, String args);
 
-    public abstract AwWebResourceResponse shouldInterceptRequest(
-            AwContentsClient.AwWebResourceRequest request);
+    @CalledByNative
+    public abstract AwContentsBackgroundThreadClient getBackgroundThreadClient();
 
     public abstract void onReceivedError(AwContentsClient.AwWebResourceRequest request,
             AwContentsClient.AwWebResourceError error);
 
     public abstract void onReceivedHttpError(AwContentsClient.AwWebResourceRequest request,
             AwWebResourceResponse response);
 
     // Protected methods ---------------------------------------------------------------------------
 
     @CalledByNative
-    protected AwWebResourceResponse shouldInterceptRequest(String url, boolean isMainFrame,
-            boolean hasUserGesture, String method, String[] requestHeaderNames,
-            String[] requestHeaderValues) {
-        AwContentsClient.AwWebResourceRequest request =
-                new AwContentsClient.AwWebResourceRequest();
-        request.url = url;
-        request.isMainFrame = isMainFrame;
-        request.hasUserGesture = hasUserGesture;
-        request.method = method;
-        request.requestHeaders = new HashMap<String, String>(requestHeaderNames.length);
-        for (int i = 0; i < requestHeaderNames.length; ++i) {
-            request.requestHeaders.put(requestHeaderNames[i], requestHeaderValues[i]);
-        }
-        return shouldInterceptRequest(request);
-    }
-
-    @CalledByNative
     protected void onReceivedError(
             // WebResourceRequest
             String url, boolean isMainFrame, boolean hasUserGesture, String method,
             String[] requestHeaderNames, String[] requestHeaderValues,
             // WebResourceError
             int errorCode, String description) {
         AwContentsClient.AwWebResourceRequest request =
                 new AwContentsClient.AwWebResourceRequest();
         request.url = url;
         request.isMainFrame = isMainFrame;
@@ skipping 40 matching lines @@
                     currentValue += ", ";
                 }
                 responseHeaders.put(responseHeaderNames[i], currentValue + responseHeaderValues[i]);
             }
         }
         AwWebResourceResponse response = new AwWebResourceResponse(
                 mimeType, encoding, null, statusCode, reasonPhrase, responseHeaders);
         onReceivedHttpError(request, response);
     }
 }