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

android_webview/native/aw_contents_io_thread_client_impl.cc

Index: android_webview/native/aw_contents_io_thread_client_impl.cc
diff --git a/android_webview/native/aw_contents_io_thread_client_impl.cc b/android_webview/native/aw_contents_io_thread_client_impl.cc
index 674832dce1d2a5d0c2481cb8662b96504ec026d5..79dc0844e86a362dc24d3b82010bdb53ebcbefc0 100644
--- a/android_webview/native/aw_contents_io_thread_client_impl.cc
+++ b/android_webview/native/aw_contents_io_thread_client_impl.cc
@@ -85,6 +85,10 @@ LazyInstance<RfhToIoThreadClientMap> RfhToIoThreadClientMap::g_instance_ =
     LAZY_INSTANCE_INITIALIZER;
 
 // static
+LazyInstance<JavaObjectWeakGlobalRef> g_sw_instance_ =
+    LAZY_INSTANCE_INITIALIZER;
+
+// static
 RfhToIoThreadClientMap* RfhToIoThreadClientMap::GetInstance() {
   return g_instance_.Pointer();
 }
@@ -254,6 +258,31 @@ void AwContentsIoThreadClientImpl::Associate(
   new ClientMapEntryUpdater(env, web_contents, jclient.obj());
 }
 
+// static
+void AwContentsIoThreadClientImpl::SetServiceWorkerIoThreadClient(
+    const base::android::JavaRef<jobject>& jclient,
+    const base::android::JavaRef<jobject>& browser_context) {
+  // TODO: currently there is only one browser context so it is ok to
+  // store in a global variable, in the future use browser_context to
+  // obtain the correct instance.
+  JavaObjectWeakGlobalRef temp(AttachCurrentThread(), jclient.obj());
+  g_sw_instance_.Get() = temp;
+}
+
+// static
+scoped_ptr<AwContentsIoThreadClient>
+AwContentsIoThreadClient::GetServiceWorkerIoThreadClient() {
+  if (g_sw_instance_.Get().is_empty())
+    return scoped_ptr<AwContentsIoThreadClient>();
+
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> java_delegate = g_sw_instance_.Get().get(env);
+
+  DCHECK(!java_delegate.is_null());
+  return scoped_ptr<AwContentsIoThreadClient>(new AwContentsIoThreadClientImpl(
+      false, java_delegate));
+}
+
 AwContentsIoThreadClientImpl::AwContentsIoThreadClientImpl(
     bool pending_association,
     const JavaRef<jobject>& obj)