Move html_viewer from mojo/services to components.

mojo/services/html_viewer/discardable_memory_allocator_unittest.cc

-// Copyright 2015 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/services/html_viewer/discardable_memory_allocator.h"
-
-#include "base/memory/discardable_memory.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace html_viewer {
-namespace {
-
-const size_t kOneKilobyte = 1024;
-const size_t kAlmostOneMegabyte = 1023 * kOneKilobyte;
-const size_t kOneMegabyte = 1024 * kOneKilobyte;
-
-TEST(DiscardableMemoryAllocator, Basic) {
-  scoped_ptr<base::DiscardableMemory> chunk;
-
-  {
-    DiscardableMemoryAllocator allocator(kOneMegabyte);
-
-    // Make sure the chunk is locked when allocated. In debug mode, we will
-    // dcheck.
-    chunk = allocator.AllocateLockedDiscardableMemory(kOneKilobyte);
-    chunk->Unlock();
-
-    // Make sure we can lock a chunk.
-    EXPECT_TRUE(chunk->Lock());
-    chunk->Unlock();
-  }
-
-  // The chunk's backing should have disappeared with the allocator.
-  EXPECT_FALSE(chunk->Lock());
-}
-
-TEST(DiscardableMemoryAllocator, DiscardChunks) {
-  DiscardableMemoryAllocator allocator(kOneMegabyte);
-
-  scoped_ptr<base::DiscardableMemory> chunk_to_remove =
-      allocator.AllocateLockedDiscardableMemory(kAlmostOneMegabyte);
-  chunk_to_remove->Unlock();
-
-  // Allocating a second chunk should deallocate the first one due to memory
-  // pressure, since we only have one megabyte available.
-  scoped_ptr<base::DiscardableMemory> chunk_to_keep =
-      allocator.AllocateLockedDiscardableMemory(kAlmostOneMegabyte);
-
-  // Fail to get a lock because allocating the second chunk removed the first.
-  EXPECT_FALSE(chunk_to_remove->Lock());
-
-  chunk_to_keep->Unlock();
-}
-
-TEST(DiscardableMemoryAllocator, DontDiscardLiveChunks) {
-  DiscardableMemoryAllocator allocator(kOneMegabyte);
-
-  scoped_ptr<base::DiscardableMemory> chunk_one =
-      allocator.AllocateLockedDiscardableMemory(kAlmostOneMegabyte);
-  scoped_ptr<base::DiscardableMemory> chunk_two =
-      allocator.AllocateLockedDiscardableMemory(kAlmostOneMegabyte);
-  scoped_ptr<base::DiscardableMemory> chunk_three =
-      allocator.AllocateLockedDiscardableMemory(kAlmostOneMegabyte);
-
-  // These accesses will fail if the underlying weak ptr has been deallocated.
-  EXPECT_NE(nullptr, chunk_one->data());
-  EXPECT_NE(nullptr, chunk_two->data());
-  EXPECT_NE(nullptr, chunk_three->data());
-
-  chunk_one->Unlock();
-  chunk_two->Unlock();
-  chunk_three->Unlock();
-}
-
-}  // namespace
-}  // namespace html_viewer