Rename some variables platform_channel_pair -> platform_pipe.

mojo/edk/test/multiprocess_test_helper.h

 // 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.
 
 #ifndef MOJO_EDK_TEST_MULTIPROCESS_TEST_HELPER_H_
 #define MOJO_EDK_TEST_MULTIPROCESS_TEST_HELPER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 43 matching lines @@
   // For use by |MOJO_MULTIPROCESS_TEST_CHILD_MAIN()| only:
   static void ChildSetup();
 
   // For use in the main process:
   platform::ScopedPlatformHandle server_platform_handle;
 
   // For use (and only valid) in the child process:
   static platform::ScopedPlatformHandle client_platform_handle;
 
  private:
-  std::unique_ptr<platform::PlatformPipe> platform_channel_pair_;
+  std::unique_ptr<platform::PlatformPipe> platform_pipe_;
 
   // Valid after |StartChild()| and before |WaitForChildShutdown()|.
   base::Process test_child_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(MultiprocessTestHelper);
 };
 
 // Use this to declare the child process's "main()" function for tests using
 // |MultiprocessTestHelper|. It returns an |int|, which will be the process's
 // exit code (but see the comment about |WaitForChildShutdown()|).
@@ skipping 14 matching lines @@
             ::testing::Test::HasNonfatalFailure())         \
                ? 1                                         \
                : 0;                                        \
   }                                                        \
   void test_child_name##TestChildTest()
 
 }  // namespace test
 }  // namespace mojo
 
 #endif  // MOJO_EDK_TEST_MULTIPROCESS_TEST_HELPER_H_