Move PlatformChannelPair to //mojo/edk/platform and rename it PlatformPipe.

mojo/edk/embedder/multiprocess_embedder_unittest.cc

Index: mojo/edk/embedder/multiprocess_embedder_unittest.cc
diff --git a/mojo/edk/embedder/multiprocess_embedder_unittest.cc b/mojo/edk/embedder/multiprocess_embedder_unittest.cc
index ae26a424a27c14c47da9565d3693764710b3ecf5..2eb7f70b5a06283623a36e0f24db5515e084b2b7 100644
--- a/mojo/edk/embedder/multiprocess_embedder_unittest.cc
+++ b/mojo/edk/embedder/multiprocess_embedder_unittest.cc
@@ -9,8 +9,8 @@
 #include <memory>
 
 #include "base/logging.h"
-#include "mojo/edk/embedder/platform_channel_pair.h"
 #include "mojo/edk/embedder/test_embedder.h"
+#include "mojo/edk/platform/platform_pipe.h"
 #include "mojo/edk/system/test/test_command_line.h"
 #include "mojo/edk/system/test/test_io_thread.h"
 #include "mojo/edk/system/test/timeouts.h"
@@ -27,6 +27,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 using mojo::platform::PlatformHandleWatcher;
+using mojo::platform::PlatformPipe;
 using mojo::platform::ScopedPlatformHandle;
 using mojo::platform::TaskRunner;
 using mojo::system::test::TestIOThread;
@@ -147,7 +148,7 @@ TEST_F(MultiprocessEmbedderTest, ChannelsBasic) {
   mojo::test::ScopedIPCSupport ipc_support(test_io_task_runner().Clone(),
                                            test_io_watcher());
 
-  PlatformChannelPair channel_pair;
+  PlatformPipe channel_pair;
   ScopedTestChannel server_channel(channel_pair.handle0.Pass());
   MojoHandle server_mp = server_channel.bootstrap_message_pipe();
   EXPECT_NE(server_mp, MOJO_HANDLE_INVALID);
@@ -193,7 +194,7 @@ TEST_F(MultiprocessEmbedderTest, ChannelsHandlePassing) {
   mojo::test::ScopedIPCSupport ipc_support(test_io_task_runner().Clone(),
                                            test_io_watcher());
 
-  PlatformChannelPair channel_pair;
+  PlatformPipe channel_pair;
   ScopedTestChannel server_channel(channel_pair.handle0.Pass());
   MojoHandle server_mp = server_channel.bootstrap_message_pipe();
   EXPECT_NE(server_mp, MOJO_HANDLE_INVALID);
@@ -368,7 +369,7 @@ TEST_F(MultiprocessEmbedderTest, ChannelShutdownRace_MessagePipeClose) {
                                            test_io_watcher());
 
   for (size_t i = 0; i < kIterations; i++) {
-    PlatformChannelPair channel_pair;
+    PlatformPipe channel_pair;
     std::unique_ptr<ScopedTestChannel> server_channel(
         new ScopedTestChannel(channel_pair.handle0.Pass()));
     server_channel->WaitForChannelCreationCompletion();