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

android_webview/java/src/org/chromium/android_webview/AwBrowserContext.java

Index: android_webview/java/src/org/chromium/android_webview/AwBrowserContext.java
diff --git a/android_webview/java/src/org/chromium/android_webview/AwBrowserContext.java b/android_webview/java/src/org/chromium/android_webview/AwBrowserContext.java
index 3d62926f47739b8d0aa22f640c228136086e6772..95592444b78f889b9c18a8aedda5f58cb7a34dff 100644
--- a/android_webview/java/src/org/chromium/android_webview/AwBrowserContext.java
+++ b/android_webview/java/src/org/chromium/android_webview/AwBrowserContext.java
@@ -27,10 +27,13 @@ public class AwBrowserContext {
     private HttpAuthDatabase mHttpAuthDatabase;
     private AwMessagePortService mMessagePortService;
     private AwMetricsServiceClient mMetricsServiceClient;
+    private AwServiceWorkerController mServiceWorkerController;
+    private Context mApplicationContext;
 
     public AwBrowserContext(SharedPreferences sharedPreferences, Context applicationContext) {
         mSharedPreferences = sharedPreferences;
         mMetricsServiceClient = new AwMetricsServiceClient(applicationContext);
+        mApplicationContext = applicationContext;
     }
 
     public AwGeolocationPermissions getGeolocationPermissions() {
@@ -65,6 +68,13 @@ public class AwBrowserContext {
         return mMetricsServiceClient;
     }
 
+    public AwServiceWorkerController getServiceWorkerController() {
+        if (mServiceWorkerController == null) {
+            mServiceWorkerController = new AwServiceWorkerController(mApplicationContext, this);
+        }
+        return mServiceWorkerController;
+    }
+
     /**
      * @see android.webkit.WebView#pauseTimers()
      */