Make shared memory allocation possible for all child process types.

content/common/child_process_host.h

 // 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_PROCESS_HOST_H_
 #define CONTENT_COMMON_CHILD_PROCESS_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
 #include <map>
 
 #include "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif  // defined(OS_WIN)
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
+#include "base/shared_memory.h"
 #include "base/string16.h"
 #include "content/common/content_export.h"
 #include "content/common/content_notification_types.h"
 #include "ipc/ipc_channel_proxy.h"
 
 class CommandLine;
 class FilePath;
 
 namespace IPC {
 class Message;
@@ skipping 61 matching lines @@
   static void PreCacheFont(LOGFONT font, int pid);
   static void ReleaseCachedFonts(int pid);
 #endif  // defined(OS_WIN)
 
   // IPC::Message::Sender implementation.
   virtual bool Send(IPC::Message* message);
 
   // Adds an IPC message filter.  A reference will be kept to the filter.
   void AddFilter(IPC::ChannelProxy::MessageFilter* filter);
 
+  // Public and static for reuse by RenderMessageFilter.
+  static void OnAllocateSharedMemory(
+      size_t buffer_size, base::ProcessHandle child_process,
+      base::SharedMemoryHandle* handle);
+
  protected:
   ChildProcessHost();
 
   // Derived classes return true if it's ok to shut down the child process.
   virtual bool CanShutdown() = 0;
 
   // Send the shutdown message to the child process.
   // Does not check if CanShutdown is true.
   virtual void ForceShutdown();
 
@@ skipping 26 matching lines @@
   // Subclasses can implement specific notification methods.
   virtual void Notify(int type);
 
  private:
   // By using an internal class as the IPC::Channel::Listener, we can intercept
   // OnMessageReceived/OnChannelConnected and do our own processing before
   // calling the subclass' implementation.
   class ListenerHook : public IPC::Channel::Listener {
    public:
     explicit ListenerHook(ChildProcessHost* host);
+    ~ListenerHook();
 
     void Shutdown();
 
     // IPC::Channel::Listener methods:
     virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
     virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
     virtual void OnChannelError() OVERRIDE;
+
+    bool Send(IPC::Message* message) { return host_->Send(message); }
+
    private:
+    void OnShutdownRequest();
+    void OnAllocateSharedMemory(size_t buffer_size,
+                                base::SharedMemoryHandle* handle);
     ChildProcessHost* host_;
+    base::ProcessHandle peer_handle_;
     DISALLOW_COPY_AND_ASSIGN(ListenerHook);
   };
 
   ListenerHook listener_;
 
 #if defined (OS_WIN)
   class FontCache {
    public:
     static FontCache* GetInstance();
     void PreCacheFont(LOGFONT font, int process_id);
@@ skipping 27 matching lines @@
 
   // Holds all the IPC message filters.  Since this object lives on the IO
   // thread, we don't have a IPC::ChannelProxy and so we manage filters
   // manually.
   std::vector<scoped_refptr<IPC::ChannelProxy::MessageFilter> > filters_;
 
   DISALLOW_COPY_AND_ASSIGN(ChildProcessHost);
 };
 
 #endif  // CONTENT_COMMON_CHILD_PROCESS_HOST_H_