Mac: Proof of concept of IPCing renderer mach_port_ts.

chrome/common/mach_ipc_mac.h

 // Copyright (c) 2006-2008 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 BASE_MACH_IPC_MAC_H_
 #define BASE_MACH_IPC_MAC_H_
 
 #include <mach/mach.h>
 #include <mach/message.h>
 #include <servers/bootstrap.h>
@@ skipping 149 matching lines @@
     GetDataPacket()->id = EndianU32_NtoL(message_id);
   }
 
   int32_t GetMessageID() { return EndianU32_LtoN(GetDataPacket()->id); }
 
   // Adds a descriptor (typically a mach port) to be translated
   // returns true if successful, otherwise not enough space
   bool AddDescriptor(const MachMsgPortDescriptor &desc);
 
   int GetDescriptorCount() const {
-                                   return storage_->body.msgh_descriptor_count;
-                                 }
+    return storage_->body.msgh_descriptor_count;
+  }
+
   MachMsgPortDescriptor *GetDescriptor(int n);
 
   // Convenience method which gets the mach port described by the descriptor
   mach_port_t GetTranslatedPort(int n);
 
   // A simple message is one with no descriptors
   bool IsSimpleMessage() const { return GetDescriptorCount() == 0; }
 
   // Sets raw data for the message (returns false if not enough space)
   bool SetData(const void* data, int32_t data_length);
@@ skipping 95 matching lines @@
   // port and deallocate it in our destructor.
   ReceivePort(mach_port_t receive_port);
 
   // Create a new mach port for receiving messages
   ReceivePort();
 
   ~ReceivePort();
 
   // Waits on the mach port until message received or timeout
   kern_return_t WaitForMessage(MachReceiveMessage *out_message,
-                               mach_msg_timeout_t timeout);
+                               mach_msg_timeout_t timeout);  // in milliseconds
 
   // The underlying mach port that we wrap
   mach_port_t  GetPort() const { return port_; }
 
  private:
   mach_port_t   port_;
   kern_return_t init_result_;
 
   DISALLOW_COPY_AND_ASSIGN(ReceivePort);
 };
@@ skipping 13 matching lines @@
                             mach_msg_timeout_t timeout);
 
  private:
   mach_port_t   send_port_;
   kern_return_t init_result_;
 
   DISALLOW_COPY_AND_ASSIGN(MachPortSender);
 };
 
 #endif // BASE_MACH_IPC_MAC_H_