Mojo: (Theoretically) implement the read side of platform handle passing.

mojo/system/channel_unittest.cc

 // Copyright 2014 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.
 
 #include "mojo/system/channel.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/embedder/platform_channel_pair.h"
@@ skipping 121 matching lines @@
  private:
   // |RawChannel| protected methods:
   virtual IOResult Read(size_t*) OVERRIDE {
     CHECK(false);
     return IO_FAILED;
   }
   virtual IOResult ScheduleRead() OVERRIDE {
     CHECK(false);
     return IO_FAILED;
   }
+  virtual scoped_ptr<embedder::PlatformHandleVector> GetReadPlatformHandles(
+      size_t, const void*) OVERRIDE {
+    CHECK(false);
+    return scoped_ptr<embedder::PlatformHandleVector>();
+  }
   virtual IOResult WriteNoLock(size_t*, size_t*) OVERRIDE {
     CHECK(false);
     return IO_FAILED;
   }
   virtual IOResult ScheduleWriteNoLock() OVERRIDE {
     CHECK(false);
     return IO_FAILED;
   }
   virtual bool OnInit() OVERRIDE {
     EXPECT_FALSE(on_init_called_);
@@ skipping 163 matching lines @@
   mp->Close(0);
 
   EXPECT_TRUE(channel()->HasOneRef());
 }
 
 // TODO(vtl): More. ------------------------------------------------------------
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo