Mojo: Add test utils to go between a ScopedPlatformHandle and a ScopedFILE.

mojo/common/test/test_utils_posix.cc

 // Copyright 2014 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/common/test/test_utils.h"
 
 #include <fcntl.h>
 #include <unistd.h>
 
 #include "base/base_paths.h"
 #include "base/path_service.h"
 #include "base/posix/eintr_wrapper.h"
-#include "mojo/embedder/platform_handle.h"
 
 namespace mojo {
 namespace test {
 
 bool BlockingWrite(const embedder::PlatformHandle& handle,
                    const void* buffer,
                    size_t bytes_to_write,
                    size_t* bytes_written) {
   int original_flags = fcntl(handle.fd, F_GETFL);
   if (original_flags == -1 ||
@@ skipping 44 matching lines @@
       return false;
 
     *bytes_read = 0;
   } else {
     *bytes_read = result;
   }
 
   return true;
 }
 
+embedder::ScopedPlatformHandle PlatformHandleFromFILE(base::ScopedFILE fp) {
+  CHECK(fp);
+  int rv = dup(fileno(fp.get()));
+  PCHECK(rv != -1) << "dup";
+  return embedder::ScopedPlatformHandle(embedder::PlatformHandle(rv));
+}
+
+base::ScopedFILE FILEFromPlatformHandle(embedder::ScopedPlatformHandle h,
+                                        const char* mode) {
+  CHECK(h.is_valid());
+  base::ScopedFILE rv(fdopen(h.release().fd, mode));
+  PCHECK(rv) << "fdopen";
+  return rv.Pass();
+}
+
 base::FilePath GetFilePathForJSResource(const std::string& path) {
   std::string binding_path = "gen/" + path + ".js";
   base::FilePath exe_dir;
   PathService::Get(base::DIR_EXE, &exe_dir);
   return exe_dir.AppendASCII(binding_path);
 }
 
 }  // namespace test
 }  // namespace mojo