Sync our homegrown SysInfo replacement with the one in Chrome base.

src/libplatform/default-platform.cc

 // Copyright 2013 the V8 project 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 "src/libplatform/default-platform.h"
 
 #include <algorithm>
 #include <queue>
 
 #include "src/base/logging.h"
 #include "src/base/platform/platform.h"
+#include "src/base/sys-info.h"
 #include "src/libplatform/worker-thread.h"
 
 namespace v8 {
 namespace platform {
 
 
 v8::Platform* CreateDefaultPlatform(int thread_pool_size) {
   DefaultPlatform* platform = new DefaultPlatform();
   platform->SetThreadPoolSize(thread_pool_size);
   platform->EnsureInitialized();
@@ skipping 29 matching lines @@
       delete i->second.front();
       i->second.pop();
     }
   }
 }
 
 
 void DefaultPlatform::SetThreadPoolSize(int thread_pool_size) {
   base::LockGuard<base::Mutex> guard(&lock_);
   DCHECK(thread_pool_size >= 0);
-  if (thread_pool_size < 1)
-    thread_pool_size = base::OS::NumberOfProcessorsOnline();
+  if (thread_pool_size < 1) {
+    thread_pool_size = base::SysInfo::NumberOfProcessors();
+  }
   thread_pool_size_ =
       std::max(std::min(thread_pool_size, kMaxThreadPoolSize), 1);
 }
 
 
 void DefaultPlatform::EnsureInitialized() {
   base::LockGuard<base::Mutex> guard(&lock_);
   if (initialized_) return;
   initialized_ = true;
 
@@ skipping 25 matching lines @@
   queue_.Append(task);
 }
 
 
 void DefaultPlatform::CallOnForegroundThread(v8::Isolate* isolate, Task* task) {
   base::LockGuard<base::Mutex> guard(&lock_);
   main_thread_queue_[isolate].push(task);
 }
 
 } }  // namespace v8::platform