Move a bunch of child-only code from content/common to content/child

content/common/resource_dispatcher.h

-// Copyright (c) 2012 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.
-
-// See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
-
-#ifndef CONTENT_COMMON_RESOURCE_DISPATCHER_H_
-#define CONTENT_COMMON_RESOURCE_DISPATCHER_H_
-
-#include <deque>
-#include <string>
-
-#include "base/hash_tables.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "base/shared_memory.h"
-#include "base/time.h"
-#include "content/common/content_export.h"
-#include "ipc/ipc_listener.h"
-#include "ipc/ipc_sender.h"
-#include "webkit/glue/resource_loader_bridge.h"
-
-namespace content {
-class ResourceDispatcherDelegate;
-struct ResourceResponseHead;
-
-// This class serves as a communication interface between the
-// ResourceDispatcherHost in the browser process and the ResourceLoaderBridge in
-// the child process.  It can be used from any child process.
-class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
- public:
-  explicit ResourceDispatcher(IPC::Sender* sender);
-  virtual ~ResourceDispatcher();
-
-  // IPC::Listener implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-
-  // Creates a ResourceLoaderBridge for this type of dispatcher, this is so
-  // this can be tested regardless of the ResourceLoaderBridge::Create
-  // implementation.
-  webkit_glue::ResourceLoaderBridge* CreateBridge(
-      const webkit_glue::ResourceLoaderBridge::RequestInfo& request_info);
-
-  // Adds a request from the pending_requests_ list, returning the new
-  // requests' ID
-  int AddPendingRequest(webkit_glue::ResourceLoaderBridge::Peer* callback,
-                        ResourceType::Type resource_type,
-                        const GURL& request_url);
-
-  // Removes a request from the pending_requests_ list, returning true if the
-  // request was found and removed.
-  bool RemovePendingRequest(int request_id);
-
-  // Cancels a request in the pending_requests_ list.
-  void CancelPendingRequest(int routing_id, int request_id);
-
-  IPC::Sender* message_sender() const {
-    return message_sender_;
-  }
-
-  // Toggles the is_deferred attribute for the specified request.
-  void SetDefersLoading(int request_id, bool value);
-
-  // Indicates the priority of the specified request changed.
-  void DidChangePriority(int routing_id, int request_id,
-                         net::RequestPriority new_priority);
-
-  // This does not take ownership of the delegate. It is expected that the
-  // delegate have a longer lifetime than the ResourceDispatcher.
-  void set_delegate(ResourceDispatcherDelegate* delegate) {
-    delegate_ = delegate;
-  }
-
-  // Remembers IO thread timestamp for next resource message.
-  void set_io_timestamp(base::TimeTicks io_timestamp) {
-    io_timestamp_ = io_timestamp;
-  }
-
- private:
-  friend class ResourceDispatcherTest;
-
-  typedef std::deque<IPC::Message*> MessageQueue;
-  struct PendingRequestInfo {
-    PendingRequestInfo();
-
-    PendingRequestInfo(webkit_glue::ResourceLoaderBridge::Peer* peer,
-                       ResourceType::Type resource_type,
-                       const GURL& request_url);
-
-    ~PendingRequestInfo();
-
-    webkit_glue::ResourceLoaderBridge::Peer* peer;
-    ResourceType::Type resource_type;
-    MessageQueue deferred_message_queue;
-    bool is_deferred;
-    GURL url;
-    linked_ptr<IPC::Message> pending_redirect_message;
-    base::TimeTicks request_start;
-    base::TimeTicks response_start;
-    base::TimeTicks completion_time;
-    linked_ptr<base::SharedMemory> buffer;
-    int buffer_size;
-  };
-  typedef base::hash_map<int, PendingRequestInfo> PendingRequestList;
-
-  // Helper to lookup the info based on the request_id.
-  // May return NULL if the request as been canceled from the client side.
-  PendingRequestInfo* GetPendingRequestInfo(int request_id);
-
-  // Follows redirect, if any, for the given request.
-  void FollowPendingRedirect(int request_id, PendingRequestInfo& request_info);
-
-  // Message response handlers, called by the message handler for this process.
-  void OnUploadProgress(
-      const IPC::Message& message,
-      int request_id,
-      int64 position,
-      int64 size);
-  void OnReceivedResponse(int request_id, const ResourceResponseHead&);
-  void OnReceivedCachedMetadata(int request_id, const std::vector<char>& data);
-  void OnReceivedRedirect(
-      const IPC::Message& message,
-      int request_id,
-      const GURL& new_url,
-      const ResourceResponseHead& response_head);
-  void OnSetDataBuffer(
-      const IPC::Message& message,
-      int request_id,
-      base::SharedMemoryHandle shm_handle,
-      int shm_size,
-      base::ProcessId renderer_pid);
-  void OnReceivedData(
-      const IPC::Message& message,
-      int request_id,
-      int data_offset,
-      int data_length,
-      int encoded_data_length);
-  void OnDownloadedData(
-      const IPC::Message& message,
-      int request_id,
-      int data_len);
-  void OnRequestComplete(
-      int request_id,
-      int error_code,
-      bool was_ignored_by_handler,
-      const std::string& security_info,
-      const base::TimeTicks& completion_time);
-
-  // Dispatch the message to one of the message response handlers.
-  void DispatchMessage(const IPC::Message& message);
-
-  // Dispatch any deferred messages for the given request, provided it is not
-  // again in the deferred state.
-  void FlushDeferredMessages(int request_id);
-
-  void ToResourceResponseInfo(
-      const PendingRequestInfo& request_info,
-      const ResourceResponseHead& browser_info,
-      webkit_glue::ResourceResponseInfo* renderer_info) const;
-
-  base::TimeTicks ToRendererCompletionTime(
-      const PendingRequestInfo& request_info,
-      const base::TimeTicks& browser_completion_time) const;
-
-  // Returns timestamp provided by IO thread. If no timestamp is supplied,
-  // then current time is returned. Saved timestamp is reset, so following
-  // invocations will return current time until set_io_timestamp is called.
-  base::TimeTicks ConsumeIOTimestamp();
-
-  // Returns true if the message passed in is a resource related message.
-  static bool IsResourceDispatcherMessage(const IPC::Message& message);
-
-  // ViewHostMsg_Resource_DataReceived is not POD, it has a shared memory
-  // handle in it that we should cleanup it up nicely. This method accepts any
-  // message and determine whether the message is
-  // ViewHostMsg_Resource_DataReceived and clean up the shared memory handle.
-  static void ReleaseResourcesInDataMessage(const IPC::Message& message);
-
-  // Iterate through a message queue and clean up the messages by calling
-  // ReleaseResourcesInDataMessage and removing them from the queue. Intended
-  // for use on deferred message queues that are no longer needed.
-  static void ReleaseResourcesInMessageQueue(MessageQueue* queue);
-
-  IPC::Sender* message_sender_;
-
-  // All pending requests issued to the host
-  PendingRequestList pending_requests_;
-
-  base::WeakPtrFactory<ResourceDispatcher> weak_factory_;
-
-  ResourceDispatcherDelegate* delegate_;
-
-  // IO thread timestamp for ongoing IPC message.
-  base::TimeTicks io_timestamp_;
-
-  DISALLOW_COPY_AND_ASSIGN(ResourceDispatcher);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_COMMON_RESOURCE_DISPATCHER_H_