[Android WebView] Implement initial settings and callback support for Service Workers.

android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java

Index: android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java b/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
index ed9efd865f92ed175aed3674c34abc4486d7c24a..517843da99f21eba2e2e8746845d165224e29bc5 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwContentsStatics.java
@@ -4,6 +4,8 @@
 
 package org.chromium.android_webview;
 
+import android.webkit.WebSettings;
+
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.annotations.CalledByNative;
 import org.chromium.base.annotations.JNINamespace;
@@ -21,6 +23,10 @@ public class AwContentsStatics {
 
     private static boolean sRecordFullDocument = false;
 
+    private static AwServiceWorkerClient sServiceWorkerClient;
+    private static AwContentsIoThreadClient sServiceWorkerIoThreadClient;
+    private static AwContentsBackgroundThreadClient sServiceWorkerBackgroundThreadClient;
+
     /**
      * Return the client certificate lookup table.
      */
@@ -90,6 +96,82 @@ public class AwContentsStatics {
         return nativeGetProductVersion();
     }
 
+    /*
+     * Set custom client to receive callbacks from Service Workers. Can be null.
+     */
+    public static void setServiceWorkerClient(AwServiceWorkerClient client) {
+        sServiceWorkerClient = client;
+        sServiceWorkerBackgroundThreadClient = new ServiceWorkerBackgroundThreadClientImpl();
+        sServiceWorkerIoThreadClient = new ServiceWorkerIoThreadClientImpl();
+        nativeSetServiceWorkerIoThreadClient(sServiceWorkerIoThreadClient);
+    }
+
+    private static class ServiceWorkerIoThreadClientImpl extends AwContentsIoThreadClient {
+        // All methods are called on the IO thread.
+
+        @Override
+        public int getCacheMode() {
+            return WebSettings.LOAD_DEFAULT;
+        }
+
+        @Override
+        public AwContentsBackgroundThreadClient getBackgroundThreadClient() {
+            return sServiceWorkerBackgroundThreadClient;
+        }
+
+        @Override
+        public boolean shouldBlockContentUrls() {
+            return false;
+        }
+
+        @Override
+        public boolean shouldBlockFileUrls() {
+            return false;
+        }
+
+        @Override
+        public boolean shouldBlockNetworkLoads() {
+            return false;
+        }
+
+        @Override
+        public boolean shouldAcceptThirdPartyCookies() {
+            return false;
+        }
+
+        @Override
+        public void onDownloadStart(String url, String userAgent,
+                String contentDisposition, String mimeType, long contentLength) {}
+
+        @Override
+        public void newLoginRequest(String realm, String account, String args) {}
+
+        @Override
+        public void onReceivedError(AwContentsClient.AwWebResourceRequest request,
+                AwContentsClient.AwWebResourceError error) {
+            // TODO
+        }
+
+        @Override
+        public void onReceivedHttpError(AwContentsClient.AwWebResourceRequest request,
+                AwWebResourceResponse response) {
+            // TODO
+        }
+    }
+
+    private static class ServiceWorkerBackgroundThreadClientImpl
+            extends AwContentsBackgroundThreadClient {
+        // All methods are called on the background thread.
+        @Override
+        public AwWebResourceResponse shouldInterceptRequest(
+                AwContentsClient.AwWebResourceRequest request) {
+            // TODO: Consider analogy with AwContentsClient, i.e.
+            //  - do we need a onloadresource callback?
+            //  - do we need to post an error if the response data == null?
+            return sServiceWorkerClient.shouldInterceptRequest(request);
+        }
+    }
+
     //--------------------------------------------------------------------------------------------
     //  Native methods
     //--------------------------------------------------------------------------------------------
@@ -99,4 +181,7 @@ public class AwContentsStatics {
     private static native String nativeGetUnreachableWebDataUrl();
     private static native void nativeSetLegacyCacheRemovalDelayForTest(long timeoutMs);
     private static native String nativeGetProductVersion();
+
+    private static native void nativeSetServiceWorkerIoThreadClient(
+            AwContentsIoThreadClient ioThreadClient);
 }