Mojo: Add embedder::PlatformSupport and a simple implementation (and a bit of plumbing).

mojo/system/multiprocess_message_pipe_unittest.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 <stdint.h>
 #include <stdio.h>
 #include <string.h>
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/scoped_file.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/threading/platform_thread.h"  // For |Sleep()|.
 #include "build/build_config.h"              // TODO(vtl): Remove this.
 #include "mojo/common/test/multiprocess_test_helper.h"
 #include "mojo/common/test/test_utils.h"
 #include "mojo/embedder/platform_shared_buffer.h"
 #include "mojo/embedder/scoped_platform_handle.h"
+#include "mojo/embedder/simple_platform_support.h"
 #include "mojo/system/channel.h"
 #include "mojo/system/dispatcher.h"
 #include "mojo/system/local_message_pipe_endpoint.h"
 #include "mojo/system/message_pipe.h"
 #include "mojo/system/platform_handle_dispatcher.h"
 #include "mojo/system/proxy_message_pipe_endpoint.h"
 #include "mojo/system/raw_channel.h"
 #include "mojo/system/shared_buffer_dispatcher.h"
 #include "mojo/system/test_utils.h"
 #include "mojo/system/waiter.h"
@@ skipping 384 matching lines @@
 #endif
 TEST_F(MultiprocessMessagePipeTest, MAYBE_SharedBufferPassing) {
   helper()->StartChild("CheckSharedBuffer");
 
   scoped_refptr<MessagePipe> mp(new MessagePipe(
       scoped_ptr<MessagePipeEndpoint>(new LocalMessagePipeEndpoint()),
       scoped_ptr<MessagePipeEndpoint>(new ProxyMessagePipeEndpoint())));
   Init(mp);
 
   // Make a shared buffer.
+  embedder::SimplePlatformSupport platform_support;
   scoped_refptr<SharedBufferDispatcher> dispatcher;
-  EXPECT_EQ(
-      MOJO_RESULT_OK,
-      SharedBufferDispatcher::Create(
-          SharedBufferDispatcher::kDefaultCreateOptions, 100, &dispatcher));
+  EXPECT_EQ(MOJO_RESULT_OK,
+            SharedBufferDispatcher::Create(
+                &platform_support,
+                SharedBufferDispatcher::kDefaultCreateOptions,
+                100,
+                &dispatcher));
   ASSERT_TRUE(dispatcher);
 
   // Make a mapping.
   scoped_ptr<embedder::PlatformSharedBufferMapping> mapping;
   EXPECT_EQ(MOJO_RESULT_OK,
             dispatcher->MapBuffer(0, 100, MOJO_MAP_BUFFER_FLAG_NONE, &mapping));
   ASSERT_TRUE(mapping);
   ASSERT_TRUE(mapping->GetBase());
   ASSERT_EQ(100u, mapping->GetLength());
 
@@ skipping 174 matching lines @@
   EXPECT_EQ(0u, hss.satisfiable_signals);
 
   mp->Close(0);
 
   EXPECT_EQ(0, helper()->WaitForChildShutdown());
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo