BASELINE: Update Chromium to 67.0.3396.47

Change-Id: Idcb1341782e417561a2473eeecc82642dafda5b7
Reviewed-by: Michal Klocek <michal.klocek@qt.io>

1 files changed, 55 insertions, 0 deletions

diff --git a/chromium/third_party/blink/renderer/platform/heap/page_pool.cc b/chromium/third_party/blink/renderer/platform/heap/page_pool.cc
new file mode 100644
index 00000000000..100a7803614
--- /dev/null
+++ b/chromium/third_party/blink/renderer/platform/heap/page_pool.cc
@@ -0,0 +1,55 @@
+// 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 "third_party/blink/renderer/platform/heap/page_pool.h"
+
+#include "third_party/blink/renderer/platform/heap/heap.h"
+#include "third_party/blink/renderer/platform/heap/page_memory.h"
+#include "third_party/blink/renderer/platform/wtf/assertions.h"
+
+namespace blink {
+
+PagePool::PagePool() {
+  for (int i = 0; i < BlinkGC::kNumberOfArenas; ++i) {
+    pool_[i] = nullptr;
+  }
+}
+
+PagePool::~PagePool() {
+  for (int index = 0; index < BlinkGC::kNumberOfArenas; ++index) {
+    while (PoolEntry* entry = pool_[index]) {
+      pool_[index] = entry->next;
+      PageMemory* memory = entry->data;
+      DCHECK(memory);
+      delete memory;
+      delete entry;
+    }
+  }
+}
+
+void PagePool::Add(int index, PageMemory* memory) {
+  // When adding a page to the pool we decommit it to ensure it is unused
+  // while in the pool.  This also allows the physical memory, backing the
+  // page, to be given back to the OS.
+  memory->Decommit();
+  PoolEntry* entry = new PoolEntry(memory, pool_[index]);
+  pool_[index] = entry;
+}
+
+PageMemory* PagePool::Take(int index) {
+  while (PoolEntry* entry = pool_[index]) {
+    pool_[index] = entry->next;
+    PageMemory* memory = entry->data;
+    DCHECK(memory);
+    delete entry;
+    if (memory->Commit())
+      return memory;
+
+    // We got some memory, but failed to commit it, try again.
+    delete memory;
+  }
+  return nullptr;
+}
+
+}  // namespace blink