Move ChildThread and ChildProcess to content. Also move remaining code that they depend on and which depends on them.TBR=avi

Review URL: http://codereview.chromium.org/6628071

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@77249 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 130 insertions, 0 deletions

diff --git a/content/common/child_thread.h b/content/common/child_thread.h
new file mode 100644
index 0000000..b4b07d3
--- /dev/null
+++ b/content/common/child_thread.h
@@ -0,0 +1,130 @@
+// Copyright (c) 2011 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 CONTENT_COMMON_CHILD_THREAD_H_
+#define CONTENT_COMMON_CHILD_THREAD_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/scoped_ptr.h"
+#include "content/common/message_router.h"
+#include "webkit/glue/resource_loader_bridge.h"
+
+class FileSystemDispatcher;
+class MessageLoop;
+class NotificationService;
+class ResourceDispatcher;
+class SocketStreamDispatcher;
+
+namespace IPC {
+class SyncChannel;
+class SyncMessageFilter;
+}
+
+// The main thread of a child process derives from this class.
+class ChildThread : public IPC::Channel::Listener,
+                    public IPC::Message::Sender {
+ public:
+  // Creates the thread.
+  ChildThread();
+  // Used for single-process mode.
+  explicit ChildThread(const std::string& channel_name);
+  virtual ~ChildThread();
+
+  // IPC::Message::Sender implementation:
+  virtual bool Send(IPC::Message* msg);
+
+  // See documentation on MessageRouter for AddRoute and RemoveRoute
+  void AddRoute(int32 routing_id, IPC::Channel::Listener* listener);
+  void RemoveRoute(int32 routing_id);
+
+  IPC::Channel::Listener* ResolveRoute(int32 routing_id);
+
+  // Creates a ResourceLoaderBridge.
+  // Tests can override this method if they want a custom loading behavior.
+  virtual webkit_glue::ResourceLoaderBridge* CreateBridge(
+      const webkit_glue::ResourceLoaderBridge::RequestInfo& request_info,
+      int host_renderer_id,
+      int host_render_view_id);
+
+  ResourceDispatcher* resource_dispatcher();
+
+  SocketStreamDispatcher* socket_stream_dispatcher() {
+    return socket_stream_dispatcher_.get();
+  }
+
+  FileSystemDispatcher* file_system_dispatcher() const {
+    return file_system_dispatcher_.get();
+  }
+
+  // Safe to call on any thread, as long as it's guaranteed that the thread's
+  // lifetime is less than the main thread.
+  IPC::SyncMessageFilter* sync_message_filter();
+
+  MessageLoop* message_loop();
+
+  // Returns the one child thread.
+  static ChildThread* current();
+
+ protected:
+  friend class ChildProcess;
+
+  // Called when the process refcount is 0.
+  void OnProcessFinalRelease();
+
+  virtual bool OnControlMessageReceived(const IPC::Message& msg);
+  virtual void OnAskBeforeShutdown();
+  virtual void OnShutdown();
+
+#ifdef IPC_MESSAGE_LOG_ENABLED
+  virtual void OnSetIPCLoggingEnabled(bool enable);
+#endif
+
+  IPC::SyncChannel* channel() { return channel_.get(); }
+
+  void set_on_channel_error_called(bool on_channel_error_called) {
+    on_channel_error_called_ = on_channel_error_called;
+  }
+
+ private:
+  void Init();
+
+  // IPC::Channel::Listener implementation:
+  virtual bool OnMessageReceived(const IPC::Message& msg);
+  virtual void OnChannelError();
+
+  std::string channel_name_;
+  scoped_ptr<IPC::SyncChannel> channel_;
+
+  // Allows threads other than the main thread to send sync messages.
+  scoped_refptr<IPC::SyncMessageFilter> sync_message_filter_;
+
+  // Implements message routing functionality to the consumers of ChildThread.
+  MessageRouter router_;
+
+  // Handles resource loads for this process.
+  scoped_ptr<ResourceDispatcher> resource_dispatcher_;
+
+  // Handles SocketStream for this process.
+  scoped_ptr<SocketStreamDispatcher> socket_stream_dispatcher_;
+
+  // If true, checks with the browser process before shutdown.  This avoids race
+  // conditions if the process refcount is 0 but there's an IPC message inflight
+  // that would addref it.
+  bool check_with_browser_before_shutdown_;
+
+  // The OnChannelError() callback was invoked - the channel is dead, don't
+  // attempt to communicate.
+  bool on_channel_error_called_;
+
+  MessageLoop* message_loop_;
+
+  scoped_ptr<NotificationService> notification_service_;
+
+  scoped_ptr<FileSystemDispatcher> file_system_dispatcher_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChildThread);
+};
+
+#endif  // CONTENT_COMMON_CHILD_THREAD_H_