Mojo: Implement passing of shared buffers across processes on POSIX.

mojo/system/dispatcher.cc

Index: mojo/system/dispatcher.cc
diff --git a/mojo/system/dispatcher.cc b/mojo/system/dispatcher.cc
index ccdf91dc9c903d7548b379c0820741aca28d8ae6..98cb8fb8b24677d507a624e6487f6502e518f844 100644
--- a/mojo/system/dispatcher.cc
+++ b/mojo/system/dispatcher.cc
@@ -8,6 +8,7 @@
 #include "mojo/system/constants.h"
 #include "mojo/system/message_pipe_dispatcher.h"
 #include "mojo/system/platform_handle_dispatcher.h"
+#include "mojo/system/shared_buffer_dispatcher.h"
 
 namespace mojo {
 namespace system {
@@ -78,11 +79,14 @@ scoped_refptr<Dispatcher> Dispatcher::TransportDataAccess::Deserialize(
           MessagePipeDispatcher::Deserialize(channel, source, size));
     case kTypeDataPipeProducer:
     case kTypeDataPipeConsumer:
-    case kTypeSharedBuffer:
       // TODO(vtl): Implement.
       LOG(WARNING) << "Deserialization of dispatcher type " << type
                    << " not supported";
       return scoped_refptr<Dispatcher>();
+    case kTypeSharedBuffer:
+      return scoped_refptr<Dispatcher>(
+          SharedBufferDispatcher::Deserialize(channel, source, size,
+                                              platform_handles));
     case kTypePlatformHandle:
       return scoped_refptr<Dispatcher>(
           PlatformHandleDispatcher::Deserialize(channel, source, size,