Replace IOSurfaceManager by directly passing IOSurface Mach ports over Chrome IPC.

ipc/ipc_message_utils.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.
 
 #ifndef IPC_IPC_MESSAGE_UTILS_H_
 #define IPC_IPC_MESSAGE_UTILS_H_
 
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 10 matching lines @@
 #include "base/memory/scoped_vector.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/tuple.h"
 #include "ipc/brokerable_attachment.h"
 #include "ipc/ipc_message_start.h"
 #include "ipc/ipc_param_traits.h"
 #include "ipc/ipc_sync_message.h"
 
+#if defined(OS_MACOSX)
+#include "base/mac/scoped_mach_port.h"
+#endif
+
 #if defined(COMPILER_GCC)
 // GCC "helpfully" tries to inline template methods in release mode. Except we
 // want the majority of the template junk being expanded once in the
 // implementation file (and only provide the definitions in
 // ipc_message_utils_impl.h in those files) and exported, instead of expanded
 // at every call site. Special note: GCC happily accepts the attribute before
 // the method declaration, but only acts on it if it is after.
 #if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100) >= 40500
 // Starting in gcc 4.5, the noinline no longer implies the concept covered by
 // the introduced noclone attribute, which will create specialized versions of
@@ skipping 878 matching lines @@
 struct IPC_EXPORT ParamTraits<MSG> {
   typedef MSG param_type;
   static void Write(Message* m, const param_type& p);
   static bool Read(const Message* m,
                    base::PickleIterator* iter,
                    param_type* r);
   static void Log(const param_type& p, std::string* l);
 };
 #endif  // defined(OS_WIN)
 
+// Mac ParamTraits -------------------------------------------------------------
+
+#if defined(OS_MACOSX) && !defined(OS_IOS)
+template <>
+struct IPC_EXPORT ParamTraits<base::mac::ScopedRefCountedMachSendRight> {
+  typedef base::mac::ScopedRefCountedMachSendRight param_type;
+  static void Write(Message* m, const param_type p);
+  static bool Read(const Message* m, base::PickleIterator* iter, param_type* r);

[erikchen, 2015/12/21 23:00:38]

Please add a comment indicating that Read() takes ownership of the underlying
Mach Send right, and that it *must* be called exactly once on any given IPC
message parameter.

[Robert Sesek, 2015/12/23 15:45:13]

Done.

+  static void Log(const param_type& p, std::string* l);
+};
+#endif  // defined(OS_MACOSX) && !defined(OS_IOS)
+
 //-----------------------------------------------------------------------------
 // Generic message subclasses
 
 // Used for asynchronous messages.
 template <class ParamType>
 class MessageSchema {
  public:
   typedef ParamType Param;
   typedef typename base::TupleTypes<ParamType>::ParamTuple RefParam;
 
@@ skipping 116 matching lines @@
   template <typename... Ts>
   static void WriteReplyParams(Message* reply, Ts... args) {
     ReplyParam p(args...);
     WriteParam(reply, p);
   }
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_MESSAGE_UTILS_H_