Move the C bindings tests to the new location.

mojo/public/c/bindings/tests/buffer_unittest.cc

-// 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.
-
-#include <mojo/bindings/buffer.h>
-
-#include <stdint.h>
-
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-TEST(MojomBufferTest, RoundTo8) {
-  char buffer[100];
-  struct MojomBuffer mbuf = {
-      buffer, sizeof(buffer),
-      0,  // num_bytes_used
-  };
-
-  // This should actually allocate 8 bytes:
-  EXPECT_EQ(buffer, MojomBuffer_Allocate(&mbuf, 6));
-  EXPECT_EQ(8ul, mbuf.num_bytes_used);
-  // The start of the next buffer is buffer + 8 bytes:
-  EXPECT_EQ(buffer + 8, MojomBuffer_Allocate(&mbuf, 6));
-  EXPECT_EQ(16ul, mbuf.num_bytes_used);
-  // 8-bye allocation results in 8-byte allocation.
-  EXPECT_EQ(buffer + 16, MojomBuffer_Allocate(&mbuf, 8));
-  EXPECT_EQ(24ul, mbuf.num_bytes_used);
-  // Allocate 0 bytes.
-  EXPECT_EQ(buffer + 24ul, MojomBuffer_Allocate(&mbuf, 0));
-  EXPECT_EQ(24ul, mbuf.num_bytes_used);
-}
-
-TEST(MojomBufferTest, Failure) {
-  char buffer[100];
-  struct MojomBuffer mbuf = {
-      buffer, sizeof(buffer),
-      0,  // num_bytes_used
-  };
-
-  // Allocate too much space.
-  EXPECT_EQ(NULL, MojomBuffer_Allocate(&mbuf, sizeof(buffer) + 10));
-
-  // Setup the buffer data so that it will overflow.
-  mbuf.num_bytes_used = UINT32_MAX - 7;  // This divides by 8.
-  mbuf.buf_size = UINT32_MAX;
-
-  // Rounds to 8, and allocates more than it has:
-  EXPECT_EQ(NULL, MojomBuffer_Allocate(&mbuf, 1));
-}
-
-}  // namespace