A64: Synchronize with r18444.

src/v8.cc

Index: src/v8.cc
diff --git a/src/v8.cc b/src/v8.cc
index 004a33946148cc2a4f9c71591c5463606726d348..76a6cb72fffc634d0f7f5c711faf62bbd7b681b8 100644
--- a/src/v8.cc
+++ b/src/v8.cc
@@ -32,13 +32,13 @@
 #include "elements.h"
 #include "bootstrapper.h"
 #include "debug.h"
-#ifdef V8_USE_DEFAULT_PLATFORM
-#include "default-platform.h"
-#endif
 #include "deoptimizer.h"
 #include "frames.h"
 #include "heap-profiler.h"
 #include "hydrogen.h"
+#ifdef V8_USE_DEFAULT_PLATFORM
+#include "libplatform/default-platform.h"
+#endif
 #include "lithium-allocator.h"
 #include "objects.h"
 #include "once.h"
@@ -79,6 +79,11 @@ bool V8::Initialize(Deserializer* des) {
   if (isolate->IsDead()) return false;
   if (isolate->IsInitialized()) return true;
 
+#ifdef V8_USE_DEFAULT_PLATFORM
+  DefaultPlatform* platform = static_cast<DefaultPlatform*>(platform_);
+  platform->SetThreadPoolSize(isolate->max_available_threads());
+#endif
+
   return isolate->Init(des);
 }
 
@@ -162,6 +167,15 @@ void V8::FireCallCompletedCallback(Isolate* isolate) {
 
 void V8::InitializeOncePerProcessImpl() {
   FlagList::EnforceFlagImplications();
+
+  if (FLAG_predictable) {
+    if (FLAG_random_seed == 0) {
+      // Avoid random seeds in predictable mode.
+      FLAG_random_seed = 12347;
+    }
+    FLAG_hash_seed = 0;
+  }
+
   if (FLAG_stress_compaction) {
     FLAG_force_marking_deque_overflows = true;
     FLAG_gc_global = true;