Mojo: Use the MessagePipe creation helper whenever possible/reasonable in tests.

mojo/public/cpp/bindings/tests/sample_service_unittest.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 <algorithm>
 #include <ostream>
 #include <string>
 
 #include "mojo/public/interfaces/bindings/tests/sample_service.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 63 matching lines @@
   }
 
   mojo::Array<mojo::Array<bool> > array_of_array_of_bools(2);
   for (size_t i = 0; i < 2; ++i) {
     mojo::Array<bool> array_of_bools(2);
     for (size_t j = 0; j < 2; ++j)
       array_of_bools[j] = j;
     array_of_array_of_bools[i] = array_of_bools.Pass();
   }
 
-  mojo::ScopedMessagePipeHandle pipe0, pipe1;
-  mojo::CreateMessagePipe(&pipe0, &pipe1);
-
+  mojo::MessagePipe pipe;
   FooPtr foo(Foo::New());
   foo->name = name;
   foo->x = 1;
   foo->y = 2;
   foo->a = false;
   foo->b = true;
   foo->c = false;
   foo->bar = bar.Pass();
   foo->extra_bars = extra_bars.Pass();
   foo->data = data.Pass();
-  foo->source = pipe1.Pass();
+  foo->source = pipe.handle1.Pass();
   foo->input_streams = input_streams.Pass();
   foo->output_streams = output_streams.Pass();
   foo->array_of_array_of_bools = array_of_array_of_bools.Pass();
 
   return foo.Pass();
 }
 
 // Check that the given |Foo| is identical to the one made by |MakeFoo()|.
 void CheckFoo(const Foo& foo) {
   const std::string kName("foopy");
@@ skipping 253 matching lines @@
   EXPECT_TRUE(defaults->a19.is_null());
   EXPECT_EQ(Bar::TYPE_BOTH, defaults->a20);
   EXPECT_TRUE(defaults->a21.is_null());
   ASSERT_FALSE(defaults->a22.is_null());
   EXPECT_EQ(imported::SHAPE_RECTANGLE, defaults->a22->shape);
   EXPECT_EQ(imported::COLOR_BLACK, defaults->a22->color);
 }
 
 }  // namespace
 }  // namespace sample