Add web worker stub implementation to avoid crash (issue #138).

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@133 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

cef.gyp

@@ -405,6 +405,7 @@
         'libcef/browser_resource_loader_bridge.h',
         'libcef/browser_socket_stream_bridge.cc',
         'libcef/browser_socket_stream_bridge.h',
+        'libcef/browser_web_worker.h',
         'libcef/browser_webcookiejar_impl.cc',
         'libcef/browser_webcookiejar_impl.h',
         'libcef/browser_webblobregistry_impl.cc',

libcef/browser_web_worker.h

@@ -0,0 +1,101 @@
+// Copyright (c) 2009 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.
+
+#ifndef BROWSER_WEB_WORKER_H_
+#define BROWSER_WEB_WORKER_H_
+
+#include "base/basictypes.h"
+#include "base/ref_counted.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebMessagePortChannel.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebWorker.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebWorkerClient.h"
+
+namespace WebKit {
+class WebApplicationCacheHost;
+class WebApplicationCacheHostClient;
+class WebFrame;
+class WebNotificationPresenter;
+class WebString;
+class WebURL;
+}
+
+// WebWorkers are not currently functional in CEF. This class effectively
+// stubs things out.
+class BrowserWebWorker : public WebKit::WebWorker,
+                         public WebKit::WebWorkerClient,
+                         public base::RefCounted<BrowserWebWorker> {
+ public:
+  BrowserWebWorker() {
+    AddRef();  // Adds the reference held for worker object.
+    AddRef();  // Adds the reference held for worker context object.
+  }
+
+  // WebWorker methods:
+  virtual void startWorkerContext(const WebKit::WebURL& script_url,
+                                  const WebKit::WebString& user_agent,
+                                  const WebKit::WebString& source_code) {
+  }
+  virtual void terminateWorkerContext() {
+  }
+  virtual void postMessageToWorkerContext(
+      const WebKit::WebString& message,
+      const WebKit::WebMessagePortChannelArray& channel) {
+  }
+  virtual void workerObjectDestroyed() {
+    Release();  // Releases the reference held for worker object.
+  }
+  virtual void clientDestroyed() {
+  }
+
+  // WebWorkerClient methods:
+  virtual void postMessageToWorkerObject(
+      const WebKit::WebString& message,
+      const WebKit::WebMessagePortChannelArray& channel) {
+  }
+  virtual void postExceptionToWorkerObject(
+      const WebKit::WebString& error_message,
+      int line_number,
+      const WebKit::WebString& source_url) {
+  }
+  virtual void postConsoleMessageToWorkerObject(
+      int destination_id,
+      int source_id,
+      int message_type,
+      int message_level,
+      const WebKit::WebString& message,
+      int line_number,
+      const WebKit::WebString& source_url) {
+  }
+  virtual void confirmMessageFromWorkerObject(bool has_pending_activity) { }
+  virtual void reportPendingActivity(bool has_pending_activity) { }
+  virtual void workerContextClosed() { }
+  virtual void workerContextDestroyed() {
+    Release();    // Releases the reference held for worker context object.
+  }
+  virtual WebKit::WebWorker* createWorker(WebKit::WebWorkerClient* client) {
+    return NULL;
+  }
+  virtual WebKit::WebNotificationPresenter* notificationPresenter() {
+    return NULL;
+  }
+  virtual WebKit::WebApplicationCacheHost* createApplicationCacheHost(
+      WebKit::WebApplicationCacheHostClient*) {
+    return NULL;
+  }
+  virtual bool allowDatabase(WebKit::WebFrame* frame,
+                             const WebKit::WebString& name,
+                             const WebKit::WebString& display_name,
+                             unsigned long estimated_size) {
+    return true;
+  }
+
+ private:
+  friend class base::RefCounted<BrowserWebWorker>;
+
+  ~BrowserWebWorker() {}
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserWebWorker);
+};
+
+#endif  // BROWSER_WEB_WORKER_H_

libcef/browser_webview_delegate.cc

@@ -11,6 +11,7 @@
 #include "browser_appcache_system.h"
 #include "browser_impl.h"
 #include "browser_navigation_controller.h"
+#include "browser_web_worker.h"
 #include "cef_context.h"
 #include "request_impl.h"
 #include "v8_impl.h"
@@ -527,6 +528,11 @@ WebPlugin* BrowserWebViewDelegate::createPlugin(
       frame, params, info.path, actual_mime_type, AsWeakPtr());
 }
 
+WebWorker* BrowserWebViewDelegate::createWorker(
+    WebFrame* frame, WebWorkerClient* client) {
+  return new BrowserWebWorker();
+}
+
 WebMediaPlayer* BrowserWebViewDelegate::createMediaPlayer(
     WebFrame* frame, WebMediaPlayerClient* client) {
   media::MediaFilterCollection collection;

libcef/browser_webview_delegate.h

@@ -132,6 +132,8 @@ class BrowserWebViewDelegate : public WebKit::WebViewClient,
   // WebKit::WebFrameClient
   virtual WebKit::WebPlugin* createPlugin(
       WebKit::WebFrame*, const WebKit::WebPluginParams&);
+  virtual WebKit::WebWorker* createWorker(
+      WebKit::WebFrame*, WebKit::WebWorkerClient*);
   virtual WebKit::WebMediaPlayer* createMediaPlayer(
       WebKit::WebFrame*, WebKit::WebMediaPlayerClient*);
   virtual WebKit::WebApplicationCacheHost* createApplicationCacheHost(