Initial checkin of the out of process worker implementation.

WebWorkerClient/WebWorker are parallel interfaces of WebCore::{WorkerObjectProxy, WorkerContextProxy} that use Chrome data types.  When WebKit requests a WorkerObjectProxy, we create an instance of WebWorkerClientImpl.  This class creates an object that implements a Chromium version of WorkerObjectProxy (i.e. with Chrome data types) through WebViewDelegate.  That object is a WebWorkerProxy and talks over IPC to a WebWorker object in the worker process.  The WebWorker object creates the actual WebCore::Worker object using another class in glue: WebWorkerImpl.

When the WebCore::Worker object running in the worker process wants to talk back to the code running in the renderer, it talks to WebWorkerImpl which implements WebCore::WorkerObjectProxy.  WebWorkerImpl converts the data types to Chrome compatible ones, and then calls the WebWorkerClient version which does IPC to get to the renderer process.  This ends up at WebWorkerProxy, which calls WebWorkerClientImpl (the original class).

In future changes, sandboxing, multiple worker processes etc will be added.  Note that I also had to make two small changes to WebKit, since WorkerMessagingProxy couldn't be created as is for the nested worker case.  I'll either check it in myself or work with Jian to do so.
Review URL: http://codereview.chromium.org/27157

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@10847 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 36 insertions, 0 deletions

diff --git a/webkit/glue/webworkerclient.h b/webkit/glue/webworkerclient.h
new file mode 100644
index 0000000..aaa56b8
--- /dev/null
+++ b/webkit/glue/webworkerclient.h
@@ -0,0 +1,36 @@
+// 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 WEBKIT_GLUE_WEBWORKERCLIENT_H_
+#define WEBKIT_GLUE_WEBWORKERCLIENT_H_
+
+#include "base/string16.h"
+
+// This is a version of the WebCore::WorkerObjectProxy interface that uses
+// Chrome data types.
+class WebWorkerClient {
+ public:
+  virtual ~WebWorkerClient() { }
+
+  virtual void PostMessageToWorkerObject(const string16& message) = 0;
+  virtual void PostExceptionToWorkerObject(
+      const string16& error_message,
+      int line_number,
+      const string16& source_url) = 0;
+  // destination, source, and level are the int values of the corresponding
+  // WebKit enums.  This avoids duplicating the enums and having to stay up to
+  // date.
+  virtual void PostConsoleMessageToWorkerObject(
+      int destination,
+      int source,
+      int level,
+      const string16& message,
+      int line_number,
+      const string16& source_url) = 0;
+  virtual void ConfirmMessageFromWorkerObject(bool has_pending_activity) = 0;
+  virtual void ReportPendingActivity(bool has_pending_activity) = 0;
+  virtual void WorkerContextDestroyed() = 0;
+};
+
+#endif  // #ifndef WEBKIT_GLUE_WEBWORKERCLIENT_H_