Ensure that the worker pool is running if we intend to use it

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index ca324603f79bdbbab5b62972c72ab84f948fb31d..340edf4db3b3de610069bb48a38e5b3044a35633 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -39,6 +39,9 @@
 #include "heap-profiler.h"
 #include "hydrogen.h"
 #include "isolate-inl.h"
+#ifdef V8_USE_DEFAULT_PLATFORM

[tfarina, 2014/02/18 16:49:02]

separate this out, like we generally do in chromium? say, move to line 62?

[jochen (gone - plz use gerrit), 2014/02/18 21:39:01]

in v8 the headers are sorted regardless of defines

+#include "libplatform/default-platform.h"
+#endif
 #include "lithium-allocator.h"
 #include "log.h"
 #include "messages.h"
@@ -2017,7 +2020,12 @@ bool Isolate::Init(Deserializer* des) {
     max_available_threads_ = Max(Min(CPU::NumberOfProcessorsOnline(), 4), 1);
   }
 
-  if (!FLAG_job_based_sweeping) {
+  if (FLAG_job_based_sweeping) {
+#ifdef V8_USE_DEFAULT_PLATFORM
+    static_cast<DefaultPlatform*>(V8::GetCurrentPlatform())
+        ->EnsureInitialized();
+#endif
+  } else {
     num_sweeper_threads_ =
         SweeperThread::NumberOfThreads(max_available_threads_);
   }