Mojo: Add a Mojo-specific multiprocess test base class.

mojo/system/platform_channel_posix.cc

 // Copyright 2013 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/platform_channel.h"
 
 #include <fcntl.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ skipping 14 matching lines @@
   *handle = PlatformChannelHandle();
 }
 
 class PlatformServerChannelPosix : public PlatformServerChannel {
  public:
   PlatformServerChannelPosix(const std::string& name);
   virtual ~PlatformServerChannelPosix();
 
   // |PlatformServerChannel| implementation:
   virtual scoped_ptr<PlatformClientChannel> CreateClientChannel() OVERRIDE;
-  virtual void PrepareToPassClientChannelToChildProcess(
+  virtual void GetDataNeededToPassClientChannelToChildProcess(
       CommandLine* command_line,
-      base::FileHandleMappingVector* file_handle_mapping) OVERRIDE;
+      base::FileHandleMappingVector* file_handle_mapping) const OVERRIDE;
   virtual void ChildProcessLaunched() OVERRIDE;
 
  private:
   PlatformChannelHandle client_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(PlatformServerChannelPosix);
 };
 
 PlatformServerChannelPosix::PlatformServerChannelPosix(
     const std::string& name)
@@ skipping 24 matching lines @@
     return scoped_ptr<PlatformClientChannel>();
   }
 
   scoped_ptr<PlatformClientChannel> rv =
       PlatformClientChannel::CreateFromHandle(client_handle_);
   DCHECK(rv->is_valid());
   client_handle_ = PlatformChannelHandle();
   return rv.Pass();
 }
 
-void PlatformServerChannelPosix::PrepareToPassClientChannelToChildProcess(
+void PlatformServerChannelPosix::GetDataNeededToPassClientChannelToChildProcess(
     CommandLine* command_line,
-    base::FileHandleMappingVector* file_handle_mapping) {
+    base::FileHandleMappingVector* file_handle_mapping) const {
   // TODO(vtl)
   NOTIMPLEMENTED();
 }
 
 void PlatformServerChannelPosix::ChildProcessLaunched() {
   // TODO(vtl)
   NOTIMPLEMENTED();
 }
 
 }  // namespace
@@ skipping 15 matching lines @@
 scoped_ptr<PlatformClientChannel>
     PlatformClientChannel::CreateFromParentProcess(
         const CommandLine& command_line) {
   // TODO(vtl)
   NOTIMPLEMENTED();
   return scoped_ptr<PlatformClientChannel>();
 }
 
 }  // namespace system
 }  // namespace mojo