linux (and some posix): multiprocess plugins compiling.

chrome/common/transport_dib.h

 // Copyright (c) 2006-2009 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 CHROME_COMMON_TRANSPORT_DIB_H_
 #define CHROME_COMMON_TRANSPORT_DIB_H_
 
 #include "base/basictypes.h"
 
 #if defined(OS_WIN) || defined(OS_MACOSX)
 #include "base/shared_memory.h"
 #endif
 
 #if defined(OS_WIN)
 #include <windows.h>
 #elif defined(OS_LINUX)
 #include "chrome/common/x11_util.h"
 #endif
 
 namespace gfx {
 class Size;
 }
 
 // -----------------------------------------------------------------------------
 // A TransportDIB is a block of memory that is used to transport pixels
-// from the renderer process to the browser.
+// between processes: from the renderer process to the browser, and
+// between renderer and plugin processes.
 // -----------------------------------------------------------------------------
 class TransportDIB {
  public:
   ~TransportDIB();
 
   // Two typedefs are defined. A Handle is the type which can be sent over
   // the wire so that the remote side can map the transport DIB. The Id typedef
   // is sufficient to identify the transport DIB when you know that the remote
   // side already may have it mapped.
 #if defined(OS_WIN)
@@ skipping 80 matching lines @@
   void* address_;  // mapped address
   XID x_shm_;  // X id for the shared segment
   Display* display_;  // connection to the X server
 #endif
   size_t size_;  // length, in bytes
 };
 
 class MessageLoop;
 
 #endif  // CHROME_COMMON_TRANSPORT_DIB_H_