Support read-only duplicates of Mojo shared buffers.

mojo/edk/test/mojo_test_base.h

 // Copyright 2016 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_MOJO_TEST_BASE_H_
 #define MOJO_EDK_TEST_MOJO_TEST_BASE_H_
 
 #include <string>
 #include <utility>
 
@@ skipping 97 matching lines @@
 
   // Writes |message| to |mp| and expects to read it back from the same handle.
   static void VerifyEcho(MojoHandle mp, const std::string& message);
 
   //////// Shared buffer test utilities /////////
 
   // Creates a new shared buffer.
   static MojoHandle CreateBuffer(uint64_t size);
 
   // Duplicates a shared buffer to a new handle.
-  static MojoHandle DuplicateBuffer(MojoHandle h);
+  static MojoHandle DuplicateBuffer(MojoHandle h, bool read_only);
 
   // Maps a buffer, writes some data into it, and unmaps it.
   static void WriteToBuffer(MojoHandle h,
                             size_t offset,
                             const base::StringPiece& s);
 
   // Maps a buffer, tests the value of some of its contents, and unmaps it.
   static void ExpectBufferContents(MojoHandle h,
                                    size_t offset,
                                    const base::StringPiece& s);
@@ skipping 87 matching lines @@
 #else  // !defined(OS_IOS)
 #define DEFINE_TEST_CLIENT_WITH_PIPE(client_name, test_base, pipe_name)
 #define DEFINE_TEST_CLIENT_TEST_WITH_PIPE(client_name, test_base, pipe_name)
 #endif  // !defined(OS_IOS)
 
 }  // namespace test
 }  // namespace edk
 }  // namespace mojo
 
 #endif  // MOJO_EDK_TEST_MOJO_TEST_BASE_H_