Added beginnings of browser-process support for shared workers.

Refactored WebWorkerClientProxy into two classes - WebWorkerDispatcher which dispatches incoming IPCs for the worker, and WebWorkerClientProxy, which handles outgoing API calls from WebWorkerImpl. This allows WebWorkerClientProxy to be reused by WebSharedWorkerDispatcher.

BUG=26233
TEST=none (will enable layout tests when basic functionality available)

Review URL: http://codereview.chromium.org/351004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@31077 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 84 insertions, 0 deletions

diff --git a/chrome/worker/webworker_stub.cc b/chrome/worker/webworker_stub.cc
new file mode 100644
index 0000000..37be7ab
--- /dev/null
+++ b/chrome/worker/webworker_stub.cc
@@ -0,0 +1,84 @@
+// 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.
+
+#include "chrome/worker/webworker_stub.h"
+
+#include "base/command_line.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/webmessageportchannel_impl.h"
+#include "chrome/common/worker_messages.h"
+#include "chrome/worker/nativewebworker_impl.h"
+#include "webkit/api/public/WebString.h"
+#include "webkit/api/public/WebURL.h"
+#include "webkit/api/public/WebWorker.h"
+
+using WebKit::WebWorker;
+
+static bool UrlIsNativeWorker(const GURL& url) {
+  // If the renderer was not passed the switch to enable native workers,
+  // then the URL should be treated as a JavaScript worker.
+  if (!CommandLine::ForCurrentProcess()->HasSwitch(
+           switches::kEnableNativeWebWorkers)) {
+    return false;
+  }
+  // Based on the suffix, decide whether the url should be considered
+  // a NativeWebWorker (for .nexe) or a WebWorker (for anything else).
+  const std::string kNativeSuffix(".nexe");
+  std::string worker_url = url.path();
+  // Compute the start index of the suffix.
+  std::string::size_type suffix_index =
+      worker_url.length() - kNativeSuffix.length();
+  std::string::size_type pos = worker_url.find(kNativeSuffix, suffix_index);
+  return (suffix_index == pos);
+}
+
+WebWorkerStub::WebWorkerStub(const GURL& url, int route_id)
+    : WebWorkerStubBase(route_id) {
+  if (UrlIsNativeWorker(url)) {
+    // Launch a native worker.
+    impl_ = NativeWebWorkerImpl::create(client());
+  } else {
+    // Launch a JavaScript worker.
+    impl_ = WebKit::WebWorker::create(client());
+  }
+}
+
+WebWorkerStub::~WebWorkerStub() {
+  impl_->clientDestroyed();
+}
+
+void WebWorkerStub::OnMessageReceived(const IPC::Message& message) {
+  if (!impl_)
+    return;
+
+  IPC_BEGIN_MESSAGE_MAP(WebWorkerStub, message)
+    IPC_MESSAGE_FORWARD(WorkerMsg_StartWorkerContext, impl_,
+                        WebWorker::startWorkerContext)
+    IPC_MESSAGE_HANDLER(WorkerMsg_TerminateWorkerContext,
+                        OnTerminateWorkerContext)
+    IPC_MESSAGE_HANDLER(WorkerMsg_PostMessage, OnPostMessage)
+    IPC_MESSAGE_FORWARD(WorkerMsg_WorkerObjectDestroyed, impl_,
+                        WebWorker::workerObjectDestroyed)
+  IPC_END_MESSAGE_MAP()
+}
+
+void WebWorkerStub::OnTerminateWorkerContext() {
+  impl_->terminateWorkerContext();
+
+  // Call the client to make sure context exits.
+  EnsureWorkerContextTerminates();
+}
+
+void WebWorkerStub::OnPostMessage(
+    const string16& message,
+    const std::vector<int>& sent_message_port_ids,
+    const std::vector<int>& new_routing_ids) {
+  WebKit::WebMessagePortChannelArray channels(sent_message_port_ids.size());
+  for (size_t i = 0; i < sent_message_port_ids.size(); i++) {
+    channels[i] = new WebMessagePortChannelImpl(
+        new_routing_ids[i], sent_message_port_ids[i]);
+  }
+
+  impl_->postMessageToWorkerContext(message, channels);
+}